I am working on my first aquaponic system, and retrofitting an Aerogarden for an inlet, an overflow, and a normal return for an ebb and drain system. I drilled three holes in the Aerogarden shell with a 1 1/8" paddle bit, and then made them slightly larger with a rotary grinding tool. I then fit all the holes with threaded drain fittings, and sealed them in place. The holes are positioned so that the overflow starts to drain when the "fill to here" mark in the aerogarden is hit (3.5 Quarts from… Continue