This aquaponic system uses a 20 watt 396gph
water pump. The fish tank is a standard 55 gallon drum under a frame made from 2"x3"s and some 1"x2"sand the gravel bed is a $12 water basin from Lowes.
It's a flood and drain using a Bell Siphon.
I built this last year and used it until mid fall and left it outside over inter and turned it back on after it was fully thawed this spring and it turned on without any problems.
We've been growing many types of lettuce, mustard greens and arugula in it. It's also being used as a cloning station for Thyme, Rosemary and Tomato plants. Last year we grew several tomato plants, a cucumber and a fist sized watermelon.