I used to have glass tops on my 75 gal FO tank, but it always overheated in the summer months causing fish losses. Now I just use eggcrate on top, no glass. My lights have an acrylic cover to keep water splashes out, and I use auto top offs to keep up with the evaporation. The reef tank has a kalk reactor for calcium supplement which is a nice bonus effect from the evaporation. The only trouble I have is high humidity in the house during the winter due to the amount of evaporation from the two tanks.
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I retired and got a fixed income but it's broke.
Ed
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50 gallon FOWLR, 10 gallon sump.
130 gallon reef, 20 gallon sump, 10 gallon refugium.
10 gallon quarantine.
60 gallon winter tank for pond fish.
300 gallon pond with waterfall.
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