I have the same system. I think 65 is a bit on the cold side, they say 68 is the ideal temperature. 72 is nothing to worry about, as long as you don't go much above that you will be alright. You can buy this reflective "quilted" insulation often used to wrap heating vents etc, and I have a piece cut that covers the top of each plant. It reflects the heat as well as insulates the pot from the heat coming from the lights. Its not too expensive and it also helps keep old leaves and debris out of your hydroton.

keylime
keylime Reviewed by keylime on . Quick question on Rez/Control Bucket Temps Hi all, Well the girls are doing well so far so no new photos, (but the girls say High). I been looking around and don't see this subject broached yet, so I'll broach it. I'm using the Ebb & Gro system. I have been using 2 lt bottles filled 2/3 with ice for rez cooling. Keeps the rez around 65°F that way. The problem is the the control bucket, which is closest to the plants, is a bit warmer (about 72°F). Should I be cooling the control bucket as well, or just it? Sorry if I sound a Rating: 5