how much will evaporate?

[Deleted member 336650]

Now if I can just get everything set so that the overflow will stay at a constant level. Any suggestions or thread links, anyone? Increasing return flow drains the sump.

GOT IT! Finally the overflow water level is constant. Just lots of tiny adjustments & I had to wait 5 minutes or so in between each one to give it time to level. Water has been level & noise has been decreased for about 20 minutes now. Next step is set up ATO. Thanks everyone

 

[BlueRoofTang]

Evaporation rate has a lot to do with the lighting (heat), temp of your house, and humidity in the house.