How do you deal with water evaporation?

paintsforyou

That makes total sense...thank you so much I will use that water as a replacment and I like the glass top Idea...makes so much sense..It holds in the water and may even add a bit more!! Thank you every one for the great advice!

fish_4_all

I let it evaportae over the week and simply refill it at the end of the week. I never lose more than 1/2 gallon in my tanks and I do a 50% water change weekly so I let don't top off.