I just bought a 10 gallon DWC system with 8 3.75" plant sites. I also bought a crap load of air stones and air pumps so there will be plenty of oxygen. What is the max temp that I can be in the DWC system where there won't be root rot? I mean my house temp stays around 74 F all the time, so how am I supposed to get my temp in the res low or is the temp in water always cooler the the air temp? Should I just sale the DWC system on ebay and get a ebb & flow system instead where i don't have to worry about temp as much in the res?