thanks for all the info, Im having problems with res temp in my aero set up, my res temps have been averaging 75 and my roots are turning brown, Ive bought a cl 85 chiller and hooked it up last night, it dosnt seem to be doing anything, im going to slow the pump down to see if it helps, I ordered the 315 watt cfl with sh hydro kit but the room its going in is going to be around 70 to 75, i was hoping to get away with an ice probe chiller but Im waiting to hear some feedback on how they work before I buy. Ive got the brown root blues.