Quote Originally Posted by Racerx
is your water temp ok right now? are the plants ok or suffering from the heat? leaves curled and cupped under? stunted growth? if your water temp is ok then for the cost of a res chiller, you could get a small A/C unit and just run it into the room and onto the res. if you get a good enough unit, this will enable you to drop 10 degrees F no problem both in the tank and in the air.
Water temps are too high for my liking (low 80's peak), and daytime peak air temperatures are around 95 degrees. No leaf deformities, but the growth rate is definitely being affected. I'm only 1.5 weeks into veg, so I have a little time to work it out. I would like to keep my setup sealed if at all possible (I like to maximize the co2 enrichment), so while the AC sounds like a good idea at first I just don't think it will be practical for this sealed setup since I do not want to exchange any air. If there was an air conditioner with some type of remote heat sink, than that would be great but I have never seen a device like that before.

I think my best bet would be to go with the chiller, and just set it to 50 degrees or so. Perhaps run some fans over the res. to help faciliate the evaporative cooling effect. How does that sound?

-CG