Thanks for the welcome and the ideas. The canopy that I built does not have fans yet because I'm still in the market to find a power supply for my LED's and fans. I like the idea about the cooling tube, but I think that the tubing material (abs, pvc...) will insulate the temperature differential too much. I like the idea to cut down on evap, though. I would try it if I had room in my canopy that wouldn't interfere with the lights (210 watts of 420nm and 10KK flourescents). Rich.
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90gal Starfire mixed reef, 400W MH (Giesemann 13K megachrome/Icecap E-ballast), (2) 54W T5 Giesemann true actinic, 45gal sump (65W 50/50 PC), ASM G-3 Skimmer, Mak 4 return, Sequence Dart closed loop, foam backdrop, 120 lbs LR, 2" sandbed, & 1 dillhole running the show.
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