MH REALLY add that much heat :(

[banditpowdercoat]

Originally Posted by mseepman

Some external pumps use the water they pump for cooling and therefore transfer their heat to the water in your display.

If your heat is still there after the lights have gone out, then it's for sure you pumps. I know the Mag's are big heat makers so that might be your main culprit.

Ohh, if they use water for cooling, t hat I can see, but my 2 externals don't use water for cooling. The mag, yes, its submersed. only 43w though, wouldnt have thought that would be enough, but maybe huh.