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Not an easy answer unfortunately. It depends on the size of the fish, the aggressivity of the fish, where in the tank they occupy, how nicely they play with members of their own species and other species. But I will say this, if chosen wisely, a 100 gallon tank could easily fit 25 or more fish, but that would entail a lot of small, peaceful fish.

If chosen wisely, taking into account their size and aggressivity, you can fit about 10 fish.

That's awesome! You're going to love your new clownfish tank. :-) And thanks for such kind words!

Jealous that you live close enough for natural seawater!

Sucks that i live right next to the sea but that water is filthy af😢

What do you mean by well working filtration . Please suggest good filtration for my 30 g tank

Interesting. Doesn’t it matter what sea water you’re putting in and the fish going in?

You know, I had the exact same question. It acts as both a second filter to catch anything that makes it past the filter sock, and as a great media for beneficial bacteria to colonize.

Good question. No water changes during the cycle. And for top off water I'm not heating it since it is such a small amount, but I am absolutely heating the water change water if I do any sort of large water change. A small weekly water change of 10% is small enough that you probably don't need to heat the water, as long as it is room temperature and not freezing! :-)

:-)

Honestly, I think 40 gallons is the perfect size beginner tank.

Yay!

Ah yes, it's the eheim feeding station. It's awesome. www.bulkreefsupply.com/eheim-feeding-station.html?queryID=4e436d16311080630328d45d70f073b8&objectID=12803&indexName=brs_prod_m2_default_products

That is a great question without a simple answer. As a beginner I would stick with tank size recommendations. Once you get more experience, you will discover that there are some fish you will be able to keep, maybe as juveniles, but then have to re-home once they mature. There are many things to consider, namely filtration, habitat, and aggression. And there isn't an exact science to this. You can always filter more, but sometimes aggression issues can only be resolved by having a larger system. Hope that helps a little -Matthew

@ thanks!

Hi there, I was referring to a small HelloReef tank. And I don't think overdosing M7 would be harmful. There are other more aggressive bacterias that may be harmful, but M7 doesn't fit in that category... at least in my experience!

Haha, I know what you mean! It's kind of a tough category to fill! :-)

Sounds like you've got a great plan for your tank so far! I think you have room for a few fish and a small CUC, but it's hard to say exactly without knowing the fish you are looking at. 20 gallons isn't huge, so smaller community fish are safer bets. Kamohara blennies are cool, stay away from damsels, a pair of clownfish would be nice, pj cardinalfish are some of my favorites.... Check out www.bulkreefsupply.com/live-goods.html for some ideas!

So I like cerith, nassarius, sand sifting gobies, and conchs. If you have a small tank, just get the snails, but if there is enough food for a sand sifting goby... it will go to town! :-)

Haha, thanks for hunting me down! I am doing great. I actually work for the parent company of HelloReef called Aperture... They also own BRS, Ecotech, AI, Neptune, etc, so you'll see me bounce around all of the channels! But I've been busy working on our new HelloReef tank videos, that I haven't made any public videos in a long time!

Okay, I'm going to be super honest hear... I've never even heard of a babylon snail! So, I'm going to do some research right now! :-)

First off, congratulations! It's a huge step setting up your first saltwater tank. Good for you. And second, thank you. Those were some really kind words. I'm grateful for hobbyists like you who take the time to reach out. Best of luck and keep me updated with how the build is going! :-) -Matthew

Great question. We highly recommend doing a weekly water change. There are experienced hobbyists who do much less or don't do them at all, but I have found that, especially for the beginner, nothing, and I mean nothing, beats the value you get out of a weekly water change! :-)

@@HelloReef ok thank you!! Are zoanthids a good starter coral??

It depends. I never found my cuc to eat macroalgae, and if they did, the algae grew so fast I never noticed! :-)

Ocean water is great for sure, just make sure it's sourced from a clean location, and your local allows for collection. :-)

The maximum you can ever put in a tank is 2 clownfish. They are highly territorial, and the only other way to do it is to have a 120 gallon tank or larger and build a clownfish harem with like 30 clowns... but that is definitely not a beginner tank! :-)

Hi there, I'm not sure exactly what you are asking, but those Alk and Mg numbers are very low. I'm actually not sure if fish/coral could live with an alkalinity that low. You may be okay in a fish only tank, but even snails and hermit crabs would struggle to build their exoskeletons with such low alk and mg.

@@HelloReef hello first thanks for responding. I meant my reef tank salinity is 1026 and alk 5.1 and magnesium is 930 I want to know can I add magnesium and Alk I afraid if I those magnesium and Alk my salinity raising up I doubt maybe my testers is failed sorry for my English.

Thanks! They've got me so busy working on our new GloFish kit that I haven't been able to make a public video for HelloReef or BRS in months! But I appreciate the kind words for sure, keeps me motivated! :-)

@@HelloReef you do excellent your plumbing rage video is spot on the truth lol.

Hi there, thanks for the question. It sounds like your tank is either cycled, or cycling. An ammonia level of 0.25 is nice and low. Just keep tracking the ammonia every few days. If it keeps going up, then the tank is still cycling. But if it holds steady and/or starts going down, then yes, your tank is cycled!

:-)

Yes, that does sound right. Let me think about it again for a second. 5 herbivorous snails, 5 carnivorous snails, 5 small hermits, 1 skunk cleaner, 2 peppermint shrimp, a small pincushion sea urchin, and two clownfish. I don't currently have the pistol shrimp and goby.My tank is thriving with this stock list. My anemones completely blanket the tank now, and I started with 8 I think, and now have about 25!

Yes, absolutely. There are pros and cons to using dry rock, but that's all I ever use. It does tank longer to establish a healthy bacterial biome, but I've not found it to be a huge problem. If you are adding reef rock, you can always rinse it off with some tap water first if it is dusty.

Thanks, I'm glad to hear this! :-)

Great question. The only way to truly know if the tank has cycled is to test every few days. Since you only waited five days, I'm going to assume the tank has started the cycle. 0.5 ppt ammonia isn't terrible, but keep an eye on it to see if it creeps any higher. Test every couple days for ammonia and nitrite. I'm guessing you will start to see nitrite show up quite soon. Once that happens, then your ammonia will start to go down. If the ammonia starts getting close to 1.0ppm, I would do a larger water change, say 40-50 percent, just to protect your fish. You could also add a product like Seachem prime, which converts harmful ammonia into something non-toxic (although it will still show up in your ammonia test). Sounds like everything is actually going to plan right now, so just keep testing. -Matthew

:-)

Razor blades work so well! I'm a huge fan of the Flipper... but I pretty much only use the stainless steel blade for cleaning

Personally, I think doing more smaller changes is by far better. Less shock for your animals, and it keeps you in the habit! ;-)

I do like the RedSea Max Nano... I just think it's might be a bit overkill for a true beginner. But I've owned one and loved it!

Thank you so much for this comment. You are appreciated and I'm glad we are there to help! :-)

That is too kind of you, and best of luck with your new tank! You may just become addicted to this hobby like the rest of us! :-)

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Heck yeah! The light is perfect for anemones, and the setting we show you in the course is set up for anemones. I started with 8 small anemones, and now have over 20 and you can't even see the aquascape! I think we are going to be posting a before/after picture on our Instagram soon, so check it out.

So with 2 tangs, butterfly, and angelfish, you are looking at a minimum of 120 gallons... maybe larger.

That's true for sure... RODI water just helps solve a lot of long term problems... depending on your water source.

Best practice is to absolutely set up a quarantine tank. I know it's not what most hobbyists want to hear, but it's the truth. That being said, I bet 90% of saltwater hobbyists don't do this. But the issue is that if your tank is happy and healthy, and you add in a new fish without quarantine, there is a chance everything will go just fine, and in fact, many hobbyists do this all the time and seem to have no problem. That's because they've been lucky. Adding a new fish to the tank just runs the risk of adding disease, disease you may not see yet on the fish. And what can happen is that new fish can get sick, spread it to everybody else, and then unfortunately wipe out all of the fish. It's super sad. And if that happens, you have to wait over two months before adding another fish just to make sure the disease is gone. You could ask the Local Fish Store if they would qt for you. Or you can just set up a super simple QT by picking up a 10 gallon aquarium from your local big box store, some large pieces of pipe for hiding, a hob filter and heater, and you've got a temporary quarantine that you can break down in three weeks when you are done. Hope that helps!

@@HelloReef so if i set up a seperate tank with filter and heater, do i need to cycle it like the helloreef tank? Or do I just fill it with new seawater when a fish is sick and do weekly water changes?

You don't need to cycle it, but you will want to test for ammonia, maybe get an ammonia neutralizer like Seachem Prime, and then do large weekly water changes. :-)

:-)

these are definitely good points all around!

Unlikely if you used reef sand and not something like playground sand. Are the fluctuating parameters causing any. noticeable problems with your tank?

@@HelloReef Yes, there are many parameter changes in my aquarium. I used terrarium sand for the aquarium

Hmm... I'm not familiar with how terrarium sand would effect a reef aquarium. That could be the problem.

@@HelloReef thanks for responding

Great question. You can, but I didn't. The main concern is to overload the tank with too much bioload. Even thought the tank is already cycled, as you add more animals, it increased the bioload, and the biological filter will need time to multiply to catch up. So adding slowly is always better.

Well that's super kind of you! It's a new channel so it will take time to grow! And I'll add flow concepts to my list! :-)