External pumps really add that much heat?

[sphelps]

Originally Posted by banditpowdercoat

can't turn off the pumps, they are only means of flow. One for closed loop, other for sump.


Russell, House temp is 71 day, 65 night. It's not the temp swings i'm really worried about, it's the evaporation. I know theres gona be evap, but 1-1.5g a day? That's alot of water into my air, and walls, carpets etc.

You could certainly turn off the closed loop pump for a day to verify it doesn't add significant heat. Same as turning of lights for one day but to verify they do add significant heat.

Only way to stop evaporation is by using lids. To prevent moisture build up in the house you can either vent out the humid air or use a dehumidifier. If it's that much of a concern and you can't afford the fixes you need to rethink your tanks. You could downsize or change the larger one into a fish only with lower lighting and lids.