I’m in a similar situation. I live in the tropics and am currently at the end of the coldest part of the year, with summer not far away getting 40’c+ (Grow tent in air con room at 24’c max).
I am running a Drain to Waste system and the water in my tote is at a constant 22.5’c at feeding time 6am. (night temp dropping to 21’c.)
My tote is 55l, has a medium size (1200l/hr) aquarium pump on 15 every 4 hour to keep water movement. 2x 10cm air stones running 24/7
I had the fish pump running 24 hour before feeding hoping it would help my pH fluctuation, only to raise my water temp to 30’c.to which I had to use the frozen bottle technique, a 3l bottle dropped it real quick, then plains at around 18’c after an hour, then climbs again, a 2am wake up every day to drop a bottle in a res sounds like a pain in the ass for a 4 plant system in a 4x4 tent!!
Questions, @Hogmaster and friends.
Will a bigger tote help, I’m going bigger anyway.
Airstones, I know the res needs O2, can they adjust the temp? I’m thinking of changing to larger stones. Any home made “air chillers” (opposite of a copper coil running through hot water, or a cold air version of a “worm” in an alcohol stil?)?.
What would be the optimal temp in my scenario?
Any help appreciated.