Mmmmm. Canopy or no canopy you'll be adding water. Check out some of the posts on auto top off. The open top is really preferable to a solid top. Your gas exchange will be compromised by covering the tank. The evaporation is normal. Heat issues will also start to rear up when you close the top in.
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180 Gallon Reef, 150 lbs of LR and 4" LS. 4-175w 10k MH. 8-110 W actinic VHO, 2 Wave2K, LifeReef Skimmer . A 90 gal sump, Top-Off. 2Mag 9.5 return, Life Reef CR LCR-1. 1 Cin Clown, Bub coral, Xenia, Purp Tang, Yellow Tang, Pogoda, 4 Gobies, Niger Trigger, Angel, Brittle Star
Last edited by Dador; 02-07-2008 at 07:16 PM.
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