That's the size tubs we use, the A/C will do you right. Beware you and your plants will love it. Might be a year round hobby. lol. Don't be surprised by a little purple some strains do it because of the cold. Our papaya the stems all turn purple at 72 degrees and the hawwianxskunkxbigbud stays real green.
LOC NAR on probation Reviewed by LOC NAR on probation on . High Res Temps My Tri-Meter says my DWC res is 80 degrees. I read in Cervantes Medical Grow Bible that anything over 85 will damage the fine hairs on the roots and cause the plant to wilt and growth to slow. I have plenty of air, 40W worth through four cylindrical 4" air stones and a bubble rope, going to the roots, so if its not getting up to 85 should I still worry about it? So far, the plant is not showing any negative signs, and the roots are still white and thriving as opposed to brown and rotting, Rating: 5