Quote Originally Posted by Roger L.
I've got 20 Talapia in my tank and I keep about 150 gallons of water in it. That's pushing it but it seems to be working. My grow bed is 12" deep however and if you don't go that deep I believe your plants will struggle as well as your siphon as Appollo pointed out. It's a lot easier to change the design rather than change an existing setup. Trust me, I learned that lesson.
Thank you! that really helps!