i'm trying to setup a auto-top off for my 20g sump. the sump is attached to my 65g tank with 2x250MH lights. I may have room for only a 1-2 gallon top-off tank. will that be enough or will i lose that much in a day? what's a good estimate for a week of evaporation? i know it's impossible to be accurate, but i need a ball park figure. thanks
YOu will proably lose that much per day. I lose about 5 gal a week on my 75 with just 440W of VHO. One thing that does affect evaporation is the amount of surface movment you have and if you have a glass cover over the tank.
__________________ Remember dont tap the glass, your fish will think you're an idiot-Anonymous mother