I thought about the UV sterilizer idea too since they are used in fish tanks but if you are going organic and you want to use any kind of beneficial backteria.. forget about it.. that light will kill everything like adding h2o2 or florashield to the res.

Best solution IMHO is an aquarium cooler.. pull those res temps down to 68 and no more bacteria problems.

also i have heard about some golden rule of never having aeroponics as your first hydro rig.. i used dwc, drip, bubble, and ebb and flow.. each of which will provide you many challenges to overcome.. Im glad i didnt start with aero now i know.. my 2c tho