Uncommon gadgets that simplify my pond keeping!

A talkthrough of some unconventional and uncommon products I use to make looking after my koi pond just a little bit easier!
Links:
Water Butt Pump: amzn.to/3MEbO8W
Food Dispenser: amzn.to/4ebaYMy
Blagdon 5 way switchbox: amzn.to/4gaEDrb
Blagdon 3 way switchbox: amzn.to/3AZk3tO
Salinity meter: amzn.to/3AWrkKH
EA Autofeeder: amzn.to/3Xcck2O
The cheapest PDV Pond salt i have found: amzn.to/3XkUieC