anyone familiar with the colisuem aero unit?

i am trying for the first time growing aero.i used my coliseum with perlite and grew hydro my first few rips and didint get what i desired.now i am going aero,ive had a few probs starting this up though.i seem to have got the system to spray and work effectivley with the exception of a few leaks through some of the cups which is creating little puddles on top of my resvs,and causing high humidity but i can solve that with a dehumidifier.my major problem seems to be keeping the water and air temp at the desired levels.the book calls for 70 to 75 degrees air and 60 to 65 water.i have small chillers in the water but they dont seem to do much,what size chillers should i use for 2 25 gallon resvs,and how do set them up?i am flowering in a 8x8x8 solidly sealed room with no leaks or cracks.i have a 6in exhaust fan hooked to a master controller,and a 4in fan that is connected to the top of my light tubes for bulb heat ventilation.then i have a 4in intake fan on the opposite side of the room near the floor.3 oscillating fans in the room circulating,and a 12000btu standing ac unit circulating air throughout the room.i cant seem to keep the temp anywhere below 80 while the light is on.the ac is exhausted directly out the room to outside.do i have a vetilation prob or does the fact that i have a 4 and a 6in fan exhausting and only a 4in intake cause an unbalance in pressure in the chamber?how do i control my heat better?