well my tank is only half full right now, and lost atleast an inch of water..... is that normal? even for a tank thats half full? how much do you lose per day?
Then that would be normal for your tank, I wouldn't be to worried. Just remember to top off with RO or distilled water if your going to. You might want to lower your spray bar if your worried about the water evaporating to much.
I keep the empty kitty litter containers filled with water. Then every morning I add a little water to my tank. I never thought about how much I'm losing.