DIY venturi, a few easy builds for aquaponics, aquaculture or hydroponics..
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- Опубликовано: 30 сен 2024
- I really like the idea of aerating the fish tank by venturi to save some coin & help make the system quieter.. A mate shared an idea with me for a unit he had been working on & was happy with.. I decided to have a crack at his idea along with a few others to see which I thought would work the best for our set up.. I was most pleased with the results & ended up going with the "Bear Unit".. I have had one in the aquaponic fish tank for over 2 weeks now with no issues & have plans to add another to a moving bed bio filter that will be added to the system soon..
Was also very pleased with the off the shelf unit. That one will be going into the moving bed bio filter in the recirculating aquaculture system & is also being used in the fish tanks on the new aquaponics system.
The black "off the shelf" venturi used in this clip is now available through our "Blog Store". All ordering information is on the link below.
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Below are a couple of pages I found helpful when looking into venturis,
• Fluid Dynamics VII: Th...
en.wikipedia.or...
leisure.prior-i...
Below is an explanation of "Fine bubble aeration" along with some useful links/references,
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Rob, Will you take a look at my aquaponic video (36 seconds) and let me know what you think of my new system?
best,
Sam
If you dump the air en-trained stream into an inverted bucket the air would collect in the top of the bucket and be pressurized by the depth. a line to an air stone curtain bar would create the very fine bubbles you are desiring. Good luck. You may have enough volume for several air stones. The air get used twice to dissolve oxygen into the water. First as it is pushed into the Venturi by atmospheric pressure and again by the larger surface area contact in the smaller bubbles. Your going to get 8 ppm of O2 at 68 degrees F more as the temp of the water decreases. Heat increases the speed of the molecules and they break through the surface easier. That is why Pop goes flat as it gets warm. Heat drives any gas out of solution. aka the unknown chemist.
But you can dissolve more air into colder water!
Hi Russel Workman..
The water in our system is so clear due to the Radial flow filters as well as the media beds removing the bulk of the solids.. We still get solids in the fish tank from time to time that we remove with a little push on vacuum attachment that fits onto the solids lifting outlet that works really well.. Aquaponic solids vacuum attachment for fish tank..
The solids get collected in the radial flow filter where he can be removed later.. Don't really have any collect in the sump tank at the moment.. I probably vacuum it out about once every 6-8 weeks during summer as the SLO picks up the majority..
Hope that helps some..
Put a mesh screen at the end of the outflow, should break up big bubbles
If one does not need a 90 degree bend, then they are better off not having one, nor spending money on one when it is not needed. The venturi effect works just as well with the venturi tube vertical or horizontal. But if vertical, the air inlet should have a tube whoes opening is always above the the height of the water so that if turned off, water does not back flow.
Here in the subtropics we have a very mild winter with the temps only dropping below freezing for a few hours at a time on a handful of days every winter.. Our block hasn't had a frost on it in the 12 years we have been here.. I had the system running all winter & was feeding the perch most days... If we were in a cooler area down south we would probably just run trout during the cooler times..
Cheers & have a great one,
Rob.
I'm sticking with the lots of little bubbles having a lot more surface area school Jack ;) The bonus is that lots of small bubbles need to break at the surface in many places so no matter which way the O2 gets into the water both are covered with a decent running unit that pumps out a large volume of small bubbles..
Hope that makes sense... I need coffee I think :/
Cheers mate & have a great one..
Rob..
Excellent ideas and thank you for doing the comparisons. I am thinking about adding one to me new aquaponics setup and getting rid of the air pump, one less energy sucker.
That's why I was looking at them as well.. Make more sense to run one unit to do both jobs.. Did buy a new 4200lph air pump as a back up for the 2 systems.. Doesn't hurt to have some extra air for the warmer months here I think..
Cheers & have a great week..
Rob.
Thank you Rob for kindly sharing your knowledge on venturi. An added bonus I came across is if your sump tank Pump is stopped the venturi will prevent water from syphoning back through the pump saving the use of one-way valves. Nick.
Hope it helps you out some Nick & sorry for taking a while to rep[ly. 👍
Cheers mate.
Rob, does the size of the pipe coming out of the back end of the venturi matter? I see you go from a 3/4" to a 1/2" and back to a 3/4". Do you have to go back to the 3/4" coming out of the venturi?
Hey Byron..
From my understanding the low pressure in the restriction is what draws the air in.. The simple venturi with some hose pushed through the elbow work well without the pipe size being expanded after the air hose so might be something to play with..
Cheers mate..
Rob Bob A venturi can be used to mix a liquid with a gas. If a pump forces the liquid through a tube connected to a system consisting of a venturi to increase the liquid speed (the diameter decreases), a short piece of tube with a small hole in it, and last a venturi that decreases speed (so the pipe gets wider again), the gas will be sucked in through the small hole because of changes in pressure. At the end of the system, a mixture of liquid and gas will appear.
That's why we use them in the systems Nicolás Solano Conde.. Makes getting dissolved oxygen into the water a lot easier I think than running compressors & air lines..
Cheers mate..
+Sarah Davis..
On the final build there will be double 45° angle fittings made up like we use on the aquaponics set up :) Spent some of yesterday gluing up the 50mm/2" jobbies for the fish farm & aquaponic refit..
Cheers & have a great one Sarah..
Frankie Bishop Please don't spam my clips trying to make sales. You're not the first & won't be the last but I don't appreciate it at all.
Get original, create something useful & offer it for free to help others rather than trying to sell via "click bait". From what I've been told it's not worth the money charged for it when there is so much free information available on the Internet.
Awesome technique for getting more air in the fish tank without the annoying water pump buzz! #aquaponics #aeration
An air stone on the end inside pipe will get the small bubbles you want.
File it for flow, and add a dap of super glue at the top for strength.
Custom make one from a larger stone to use that 1/4” i.d. tubing you have there.
Those long straw like air bars will fit the line ok, but are worthless for making bubbles.
Don’t bother!
This straight tube method is still the best for aerating at a maximum.
Big bubble surface area is touching more water than little ones,
and when they surface will “boil” even more air in.
I found increasing the flow helped to get more finer bubbles with some of the units. 👍
Rob, that water looks great in your IBC. I'm assuming you're using a rad. or swirl filter?
Hey Brad..We had a small radial flow filter on the aquaponics in that set up.. Any fine solids that made it through get caught in the bed but I don't think that's a big issue..
Cheers & have a great one..
Hello dear Rob. I'm Andrii from Ukraine, and fond of aquaponics. We have a very poor market of any fittings for pipes. We dont have any rubber fittings. Please help me to find this in ebay, can your send me any link to buy this rubber fitting to path through the barrel? Thanks.
Hi There. I found this place in the UK that ships to the Ukraine .
www.unisealshop.com/page.cfm?page=26&ShortTitle=Uniseals%20Ukraine&countryid=44
I can't vouch for them myself but hope it helps some.
Cheers & have a top one.
Evening Wayne..
For the test t was a 3800LPH & in the fish tank there is a 4500LPH unit.. Both are Sunsun branded but think they may go by other names depending on who imports them..
Cheers sir & have a great weekend..
Is it possible to do a Venturi from a gravity fed return line
You can but the amount of air that will be injected will be less than in high flow situations.
Hope that helps some.
Cheers.
Hi David..
I have seen that build & think it is great but a bit over sized for my 1000L/270gal FT though..
Would be great for a pond though I think...
Cheers Mate..
I think it will reduce it somewhat Jay.. Not really an issue when you on the grid but when your harvesting the energy yourself, every little bit you get has to be used efficiently as possible, but you already know that.. You could play around with the pond if you come across some panels or small wind turbine..
Cheers Sir & hope all is well with you & yours :)
Rob.
Cheers S
does this mean that pump will be working 24/7 or not ? need your help :) thank you in advance for your brilliant videos
Our pumps work 24/7 but others run theirs on timers if that's any help.. As long as the fish tank volume is exchanged a minimum of once an hour the water should be clean enough for the fish..
Hope that helps some & am glad the clips have given you a few ideas..
Cheers..
Cheers for the video, it helped me design my own venturi and finally get rid of my air pump, I've decided not to put mine in my fish tank, I've got mine in my sump, I have had to restrict the flow between my pump and fish tank with a ball valve because my fish tank started overflowing, (my pump may be a little to powerful🤣) I've redirected the water that I've restricted from going into my fish tank back through a venturi and it returns to my sump which adds oxygen to my water.
I do have a video on my very new channel (it's the only one so far) if you want to see how it works.
In some instances they do but they also put extra load on the pump depending on what type you use John.. For us it's a win win situation, less power being used & no hum of the air compressor so I'm happy :D
You can also go the other way & use air to pump the water which adds the O2 as well as circulates the water for the system.. Good for smaller systems from what I have seen though..
Cheers sir & hope alls well down your way :)
im a aquaculture student and i need to do individual project about how venturi system help with the water quality. Any tips ? Thank u
They basically add extra air / o2 into the water for the fish. Having them "jet" the water in can also help with water movement in the tank.
Hay dude , how do you lower the ph in your system mine is crazy high alkaline. All I can do is drain it off and add tap water, which sucks.
I did a clip on lowering it if it helps any.
ruclips.net/video/eO1pHM7Afuw/видео.html
Just remember to ONLY lower the top up water so the fish won't get harmed by massive pH swings. 👍
This video was made in 2013, are you still using this venture? Or are you back to air pump
Hi Mate.
I was running the commercial venturis in the tanks up until a few months ago mate. The fish I'm running at the moment don't handle the heat well so have dropped in some air stones to help increase the dissolved O2 for them. Once they are all harvested I'll be getting Jade perch again which I found were fine with just the venturis at the stocking levels I had.
Sorry it took a while to get back to you
Hope that helps mate & all's well with you.
Rob.
Nice. Only people who understand what they are looking at would appreciate all the nuances. Thank you!
You are welcome & have a top one.
Have thought about using some shade cloth as the holes are smaller but I think we are both on the same page ;)
Shall be gluing up the final unit for the system this week along with 2 for the RAS as I think it has proven it's worth..
Cheers Ra & have a great one..
That worked very well. I know you don't have four hand so Hi Koo. Hmmmm. Hikoo isn't that some sort of martial arts or something?
hi. my .02 i think, for best results, the orientation of the venturi should be perpendicular to the water flow, not inline with it. cheers
Morning David..
Found that out in our most recent build that to get the best I had to install the venturi in the barrel/tank itself.. Think I will be using that method from now on..
Cheers sir & have a great weekend,
Rob :)
Can you place a wad of aluminium fly screen mesh or stainless steel scourer in the line to break up the bubbles before exiting?
It may work to a degree but haven't felt the need to try it myself.
Cheers.
This HAS been helpful Rob! I'm needing to put one in my fish pond and/or I may even build it into an vertical grow system (connected to the Koi pond) as well....I'm curious, what brand and model of pump you were using? Awesome video brotha, well done. ~Wayne
I used the 90 version style, but with a T (end with the pen pointed up and capped with a hole drilled in it) and used the bic pen. However I slightly crimped the end into a small slit. This dramatically reduced my bubble size and has been working well in my 450 gallon system for almost 3 months.
Nice one Don.. That was the only style I saw around when I first started to look into venturis.. Made one along those line but used the thin aquarium air line instead of the pen in the top of the cap & had no real luck with it so gave away playing with them for a while.. Would really like to play around with a dissolved O2 meter to see how well they really work when it comes to bubble size.. Have added it to my B'Day wish list with the boss but don't like my chances :D
Cheers sir & have a great one,
Rob.
I really like your videos. They are the right mix of technical and conversational, and have kept me up many a nights figuring out how I want to expand my little backyard system! Thanks so much!
Use to make me cringe whenever we could hear it in the house.. Neighbours house is closer than us but they said they couldn't hear it... Think they were just being polite..
Cheers sir & have fun playing around with it..
The idea you shared works perfectly. Don't buy one when you can make your own for under $5 AUD. Thanks Rob :)
Thought about doing that in the past but decided on air stones then venturi.. I like the idea of the bubbles & flow in the base of the tank stirring the water up more with the venturi.. Have noticed that the solids don't pool in just one area now which I think is a good thing as it means the water is circulating better in there now..
Cheers Charles & glad you like the clips..
All the best,
Rob.
It was uploaded a few months ago but left private so I could get some help from some people on an AP forum.. Could be that the iPad app hasn't seen it's now open for all to see..
Hope you had fun in the cave & shopping Dave ;)
Cheers Sir..
Small mesh over the outlet will turn big bubbles into small.
Works to a point but it also clogs up a bit as well.
Cheers mate.
When you restrict flow in a centrifugal pump, there's LESS load on the motor... Won,t burn it up!
Hi Rob. Greetings from the West Coast of Canada!
Just thought I would pass along to everyone something that I learned at a seminar on aquaculture.
If you're ever wondering if there's enough dissolved oxygen for your fish, just watch and see if they spend most of their time hanging about at the the bottom of the tank. If they do, then you have enough oxygen, as there will always be higher concentrations of O2 near the surface, due of course to the fact that gases are lighter than water and tend to get pushed up.
This is why fish will gasp at the surface if they are short of oxygen.
I thought it was a very useful tip when I heard it, and thought I'd pass it on.
Love the vids and your delivery. Keep "em comin'!
Cheers Steve.
Have a top one.
Nice simple options, thanks.If a really efficient Venturi is required it does need a taper inside the water feed tube that has two angles. The air intake enters at the low pressure point.
Love your video's i'm starting a Hydroponic 1st then move up to your idea's keep the videos up thanks.
Glad you've been enjoying them mate.
Cheers & have fun with the build.
Hope they come in useful Robert.. Would like to know how you go if you play around with any them..
Cheers mate & all the best..
Rob.
Hope it gives you a few ideas & enjoy the build..
One of the best parts is planing & constructing the system I think..
Cheers, Rob..
Hi , why is mine pushing water out instead of sucking air ?
At a guess I'd say that you will need a higher powered pump or that the air intake hose is around the wrong way if you're using a DIY one like I showed in the clip. 👍
Hey Rob I saw the size of your fish WOW what kind of fish do you have? Wanted to know how the Venturi set up is working? Your videos are great! Thanks for the info!
Hi Jack. Sorry for the slow reply.
The fish are Jade perch, which are an Aussie native fish.
At the moment I'm running the black venturi in the fish tank & find it works really well.
Cheers & have a top one.
Hey RB???? Can I put fish in sump tank as well as fish tank? Maybe mature fish in fish tank and fingerlings in sump? Good idea or bad? Also... I have 200 liter grow bed and 1 blue 55gal drum cut in half... How many fish can I have w that setup(I will be expanding for sure)
I have fish in sump tank and fish tank but i have problems with solids..
Are you aerating the grow beds at all, or only the fish tanks?
+YWAM Chico Agriculture
Hi There. Just the tanks for the time being but that will change once the raft beds go in. Will be feeding them with a small venturi to help oxygenate the roots.
Cheers.
Whoops, The pumps are Sensen branded Wayne..
Sorry about that..
Great info, thanks for making this video. I needed a quick and cheap solution to start adding air to my pond, as it's been hot and dry here in Florida, at least for this time of the year. Coupled with it being too still, it was starting to stagnate and I didn't want to end up with a fish kill if I waited too long. The pond's main purpose is as a sort of fire hydrant, since there is no municipal water services where we are, but we enjoy the snakes, fish, frogs, and turtles that call it home as well. The ideas in the video helped get the job done, for now.
I've got an artesian well that's used for keeping the pond filled, so I just added a venturi in to the line. I experimented with putting it at the start, middle, and end of the line, and having it by the valve works well while avoiding the problems with locating it elsewhere. (Debris, pond height, etc.) I did find that by extending the length of the air line coming in, it actually suppressed the sucking sound quite a bit. That extra length also allowed me to orient the opening towards the ground, protecting it from being bumped and keeping the opening from having stuff fall or blow in to it.
It's not the ideal solution for my application, but I think it will help out until I can bury electric service out to it and buy a proper aerator for a pond this size. Again, your video was very helpful, thanks for taking the time to make it.
Simple Venturi For Pond Aeration
Nice one mate.. Thanks for the clip.. Looks like you're getting a load of air into the water & am glad it's worked out for you.. Are those solar pumps any good for aeration purposes ?
Cheers & all the best..
Hi Rob, from what I've read the size of the bubbles really makes on difference as their not in the water long enough to make a difference. It's the bubbles breaking the surface tension that does the oxygenation but like most things their are as many schools of thought as ways to do things. Thanks for the video mate.
It's one of those things that works but most everyone is wrong about why it works. A powerhead in the tank may be a better option than injecting dirty air into your water at high speeds
That's great stuff mate. I have a question did you upload the sick perch video any different from normal? I'm asking because I have been using an iPad to view as my laptop died. But the sick perch vid is not listed with the RUclips app. I just went on the PC in the office and saw it listed. Wonder how meany other vids I can not see? So I am off to do some work on the guitars and then buy a new laptop for the man cave. Cheers Dave.
Rob Bob: Since you were curious about other people's take on the venturi I will give it a go. The first place I ever used a venturi was in science lab. The faucet was designed to shoot out a jet of aerated water and the venturi air intake was our vacuum line. Later I noticed a dozen venturi on my hot tub. Same design, the fast jet of water causes low pressure and thus air is sucked in (velocity and pressure in a
tube math). In a practical application high pressure occurs at points of dilation in a tube. Aneurysm in a blood vessel or a bubble in your garden hose. Low pressure at the constricted points where velocity is increased. MY POINT - buy your venturi from the spa store or online spa depot or whatever, they are the spa or hot tub jets. My contribution for your wonderful videos. Thank you again, from USA.
Thanks for that Tanner..
Have had a few folks recommend the spa units but haven't played with one as of yet though..
Cheers & have a great one,
Rob..
The problem I'm having is water is coming out of the air tube (using your first build). I've checked the direction of the tube opening (away from the water flow), have adjusted the depth of the tube in the T and have cut different angles in the tube. Any other ideas?
Hey Byron.. what size pump do you have on the system?
Sorry to be so tardy on my reply.
I'm using a 1350 gph pump. However when I moved from a .5" venturi to a .75" venturi and put a 1" exit pipe of the end it began working well. I think I was just blowing way to much pressure into the venturi. Anyway, all seems to be good now.
Thanks for your reply in interest.
Cheers,
Byron
Byron Wooten That's great to hear Byron.. Am glad you got it all sorted.. No worries on the slow replies.. Can be a bit slack myself when it comes to replying..
Cheers & all the best..
Hey there Michael.. Hope all's been well..
Shaun sent me a link to it the other day & it looks like a great idea..
Cheers sir & have a great one.
Rob..
Has anyone ever used a venturi to aerate compost tea?
Many folks do 👍 They will also a pump to create a vortex to help aerate the brew.
Thanks +Alicia Price :-)
D
Robbo here is something that could help you move water as well as aerate it I'm going to use in the duck-a-ponicics it's an air lift water pump, I've duck water is much higher in nutrients the problem I was running into water clogging pumps
Gordon Pilcher Cheers Gordon.. Have seen a bit on the air lifts & will probably have a crack at one at some point.. Just another job/project to add to the list ;-)
Hope all's well with you & yours..
Just keeping you on your toes Lad
Gordon Pilcher Cheers mate :-)
would you know the psi of the vaccuum on the air drawn in from the black air inlet?
Hi there... I haven't got a way to measure it at the moment sorry crash100.. I do know that it is supposed to draw through 900lph on a 3500lph water pump according to the manufacturers site..
Hope that helps some..
im trying to do a little more than feed the fish so to speak but i have to say this video has been extreemly helpful; thank you
Hi Rob. Good afternoon. I tried to also put a venturi in my setup. Just noticed that when I turn off the pump, the venturi initiated a reverse siphon. Is this normal? And any suggestion on how to prevent this? More power!
A one way valve before the venturi is what I have seen used in aquaculture systems Louie.
When I use them, I have them entering at the top of the fish tank on a slight angle so only the 40mm was actually under water. That way the air port at the top allows enough air in to break any siphon & if it didn't then only a small amount of water would backflow to the sump.
Hope that helps some.
@Rob Bob's Aquaponics & Backyard Farm Thank you! Another question.. is it better to put the venturi in the sump tank? So that the plants will also receive water with oxygen? I'm having a NFT setup for my plants.
@@anonymouse3823 It may help to have some aeration in there Louie. It's my understanding that they will get air from other roots that aren't in the film of water that's running down the rails.
:D Japanese Poetry.. My eldest had a phase of trying to speak in it.. Lasted about 1 day before it got too tedious for her..
Cheers Dale & have a great one :)
Do u use any water filter or UV light?
I did when I had an algae outbreak in the old fish farm but not in the aquaponics. Cheers.
Cheers & hope it gives you a few ideas..
Have a great one..
Rob.
Cheers Richard :) Was fun & only slightly drenching top make ;)
All the best Sir :)
this is a valuable resource thank you. why isn't your water turning white like most true venturi do tho? I think they say reducing the initial water inlet by at least 10x gives favorable results
The pump I used wasn't powerful enough Rik. 👍
@@RobsAquaponics Oh jeeze, so that's the main factor on that? Blast it super hard and get more bubbles? I was about to build a tank for H20 that would be hyper oxygenated by TI electrodes and venturi then venutri blasted down the line to be blended with a small shot of worm tea and concentrated worm liquid nutes as needed.
@@RobsAquaponics That way no toxic bi product gets made by electrolysising anything but the h20 and the nutes and h20 get at least 2x the 02 amount for super good delivery
I love this video I have something similar that I got from the autopot festival last year but the one I have has an air filter that you can change once a year
Great video. I have been looking for an easy way to spray fertilizer in my garden. This system will definitely work to suck up the fertilizer, mix it and spray it. Thank you for sharing.
atrohad Hi there.
Would love to know which one you used & how it went mate.
Cheers.
Great stuff Rob. Plan to do some testing down the road myself. I want to try to use a natural venturi to stimulate aeration in a deep water culture system. Also I'd like to see if I could gravity feed it, from a raised bed above.
What type of fish are in those tanks...
Those are Jade perch which are native to Australia.. They're a great fast growing table fish..
Cheers..
Cheers Mr Dale.. Only soaked myself a few times :D Thinking it could be useful in small hydroponic set ups too..
All the best to you both..
Rob..
can this be used in place of an air stone?
Only if you have a backup system that is triggered if the pump fails. Having a blackout trigger is not enough as I have had pumps burn out & which means that the back up wasn't activated.
Cheers.
I was told that some do it in the return lines from their grow beds to the sump tank & is something I will be looking into.. Even if it only adds a bit of O2 it's better than nothing I figure..
Cheers Jason & have a great one..
Rob..
Cheers for that & hope the info is useful for you..
Have a great one, Rob :)
It's taking it's time but am getting there slowly..
Have a great one,
Rob..
thank you for reply Rob.. m totaly organic never use chemicals. so its no no for food plants?..
I wouldn't if you've added aquarium chemicals to the water. 👍
to make the bubbles smaller have you thought of running a few layers of plastic window screening around the holes with a bit of distance between the layers to break up the bubbles? or you could use a wrapping of open cell foam to do the same thing. Open cell foam might trap and debris in the fluid though and require cleaning.
Hi there Thomas..Have had a few people suggest that thanks.. The bubbles we're getting from the bar arrangement at the end of the delivery pipe are fairly fine where the ones in the tester barrel were just running from the end of the pipe so were rather large..
Cheers & hope you enjoying the holiday season..
Rob.
Rob, I messaged you on IG, can you please check. Also, if I sufficiently aerate my sump, would I still need to aerate my fish tanks?
Hi GG. Any chance you could ask it here? I have a load of PM's on Instagram & wouldn't know where to start trying to find it.
It's best to have air added to the fish tanks in case of failure elsewhere in the system.
If the pump dies, you may well lose your fish as well as there will be no O2 rich water making it into the tank.
Cheers.
Hi Rob. Question. Do you think that a Venturi Tee will be able to supply enough air to a 55 gallon tank with 20 Tilapias?
Also do you think that if I fill another 55 gallon tank with gravel I could use it as a bio filter for 2 other 55gal drums with 20 fishes each?
@@GG-du6go Hi mate.
I wouldn't rely on just a venturi either as they don't work if there's a water pump failure. I would have a dedicated air pump as the O2 demand for such a highly stocked system would be more than a basic DIY venturi could provide IMO
I wouldn't do 20 tilapia in a 55 gallon tank full stop. 1 fish per 5¼gal is what I like to stock at for their own health but still wouldn't do it in such a small drum.
The rule of thumb for grow bed based bio filtration in DIY systems is 6.6gal of wet clay/¾" rock per fish.
I wouldn't just fill a barrel with rock & use that as a biofilter as solids would build up quickly & you'll end up with a load of dead fish.
Hope that helps some.
@@RobsAquaponics thank you Rob
Put a spray bar at the surface making bubbles and that will give you plenty of oxygenation . That's how I set my aquaponic system up. Works great for me. So far everything we have put in there is growing good. Thanks for all the good info you share with us.
Charlie...
Gidday Rob, cool video mate. I am possibly looking at doing some small scale aquaponics soon, so appreciate all the tips, thanks Marty!
No problem Marty.. Let me know if you want any info or sites that might help you out..
Cheers mate..
air intake must near to the outlet
Yep. 👍
Loving you work Rob I made a failsafe on mine -Simply run a pipe over back to the tank
Excellent videos Brother. Thanks, and respect.......Seven Thunders///////
Hi Ivan & thanks mate.
Cheers & all the best to you mate. 👍🙂
Cheers, hope it comes in handy for you..
Rob..
Cheers Gaspar..
Take it easy..
Rob.
Another idea would be adding the air intake venturi to the pump intake line, rather than its output. The bubbles would then be broken up by the pump impellers at the beginning of the system, rather than having to route flow back. Or having venturi's in both places.
Not sure how that would go but worth playing around with.. Might need to alter the shape of the air intake pipe a bit from the way its set up now so it just doesn't suck too much air.. Will definitely keep it in mind when I get down to play around with it again..
Cheers Jim..
Rob,
Thanks for this video. Great insight!!!
Thank you for sharing. I recently build a 16000 gallon Koi pond with a 5'X 10' bog filter. I wanted to induce air to the water as it entered the bog. Your DIY will make that happen.
Hope the venturi does the trick for you Benjamin.👍
I used similar constructions in fish tanks. If u get larger bubbles, it helps to run the outlet of the pipe against the wall of the tank. If you have some decent pressure then the large bubbles will hit the wall of the tanks and burst in small bubbles.
Worked really well in my fish tanks!
Hi there & thanks for that..
Ended up running with a few I was given in the aquaculture build but think the home made jobbies will get a run somewhere in the new system soon..
Cheers,
Rob..
Another outstanding Idea !!!, thanks for taking the time to share what you're doing with your aquaponics setups, I'll defiantly be using this idea on my setup.
Hope it gave you a few useful ideas..
Cheers & have a great one..
Hi I need help with something that I see on your fish tank
What would that be mate?
I didn't remember but can I get you're email for got a talk about the system because I'm going to start with one
Hi Rob Bob, really appreciate your videos. I am planning my aquaponic system and I stumbled over different Venturi DIY. I was wondering, would it work adding a venturi to the end of a Bell Syphon ? Not sure if the gravity fed venturi would help at least a little bit. What do you think ?
Hi Patrick.
I'm not sure one on the bell outlet is needed as the falling water will tend to aerate the water a fair bit I'd think. Don't think it could hurt to add one though. 👍
Cheers mate & happy growing.
Excellent info there ... think I might need to play with that idea a little bit. I love the sound of the water flowing but I hate the sound of my little air compressor in the greenhouse so that might be a solution. Thanks!
Good
Thanks
Preisious
👍👍 Cheers.
6:17 smaller the air intake tube…higher velocity air intake & resulting finer bubbles. Three stops at fast food joints & you would have enough straw sizes to create reducing section of air intake. Not sure if can be done effectively with ball valve
Hi. Very inspiring tube. I would like to know if they're still a link available for your last pre-built venturi. The one with the clear see thru pipes? I couldn't make the name of it. I'm not fluent with english. Thank you
+kapow kapow
Hi there.
We are selling the black venturis here in Australia at the moment & can ship them over seas if that's any help. Whereabouts do you live?
Cheers.
Nice explanation bro
Cheers LM. 👍
I have the clay pellets in the grow bed. Was always wondering it the emptying and filling process would be bring in O2
I airated 12,000 fish with a submersed water pump which carried water horizontally to fall back in the pond. I put a Y fitting backwards in that line so it sucked in air. It helps if there is at least a meter of horizontal pipe after the Y to allow the air & water to mix before falling back into the pond. So simple.
👍 Nice one.
Hey Rob. Do your fish ever get stuck in the plumbing? Or do you have some sort of screen in front of the intake tube? Do you have a video addressing this?
Sean Rafferty Hey Sean. I have one on the on the fittings I use on the end of the solids lifting overflows.
ruclips.net/video/fQEh4FSNMrE/видео.html
Fairly easy & cheap to make.
Hope it helps mates & let me know if they're of any help.
Rob.