Since there is a lot of conflicting info, disinfo, misleading info or just plain bickering, let's hear from everyone on what they run their res at in this thread. I set it to allow two responses in the event that you let your temps drift or if they just vary. This is for people chilling their reservoirs only. I see a lot of people saying anything under 65f will slow growth a lot, and others saying under 55f slows growth. Others say you will get root rot above 72f and others above 65f. This likely confuses the shit out of new growers, so lets try to establish some good results here. If you are going to argue a point at least give a logical reason. Experiences on sterile res/bennys are welcome. I run mine at 60f in rdwc and have never experienced any slowed growth, and run hydroguard at 2ml/gal twice a week. I never have root rot issues with this regimen.