I'm starting an aquaponics system and plan to use a fill and drain system with a bell siphon. My limiting factor is going to be my tank. I'm going to be using a 125 gallon tank for the fish. I'll have a few smaller 20 gallon tanks for other purposes if needed. I'm going to start with one grow bed that's about 3' by 1.5' and about 4 inches high and hopefully expand to double that as fish grow.

Can I grow tilapia in this system or is there a better option as far as edible fish that I should grow instead with such a small tank?

Any advice or direction would be greatly appreciated!

Thanks!