[sjnovakovich]

Thanks. What is an auto top?

Using a wet/dry sump water you will lose water in the sump and not the display from evaporation. An auto top off automatically adds that evaporated water back when the level sensors call for it. All you need to do in keep water in the reservoir, which if it's big enough you might be able to make it over a week. Many companies make these but here is a plug and play setup, all you need is a pump. I use a $6 pump from harbor freight, you can even use a powerhead if you can get a hose on it.

http://www.premiumaquatics.com/aquatic- ... J-ATO.html

I have a hinged glass top on my sump tank, and I use very little to evaportation.