we used the smallest A/C we can get. It's a 5000btu from slowes.
Something to bring your room temps down to bring your water temps down.

If that is not possible a water chiller for aquariums. Very costly.

Or you can freeze plastic soda bottles full of water and float them in your rez to bring temps down.

Rez temps are what we fight the most.
LOC NAR on probation Reviewed by LOC NAR on probation on . my first grow with kaya 47 hi ya this is my first grow i have all the gear set up in cloeset with 150 sont bulb with ballast. in nft tank. the seeds are now in germination. but once they have sprouted and i put them in to the larger rockwool cubes how much light should i give them? please need sum help. i have took some pics of set up ect. Rating: 5