Quote Originally Posted by dejayou30
No I never got an IceProbe, no money. I will probably pick one up during the winter of this year to use for next summer. From what I understand, they are best suited to 20 gallons or less as they are designed for fish tanks, so IDK if it will work for your 55 gallon. Hope you can find more info.
Hey there just wanted to chime in shortly on the air pump location issue. I have seen water temps up to 90 degrees in my DWC scrogr tub. I know you mentioned trying to put the pumps in front of your AC.

A few thoughts.

1-check the bottom of your air pump. Is it hot? Some air pumps can produce more heat over time due to wear and can end up pumping hotter air through your res. I had this problem, replaced my pump-problem solved!

2-is the pump/ pumps COMPLETELY outside the growing environment? Even cheap diaphragm air pumps have no problem with long tubing runs. Keep those pumps in the dark and AWAY from the grow.

These two factors helped me bring my res temp down over 15 degrees. I know this isnt new info, but it sure worked for me!
sdholic Reviewed by sdholic 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