Dustin1300
Reefaholic
Oh okay well I don't have to worry about heat since I still am stuck up north lol. Just to clarify with the dart pump the motor itself runs very hot for me. The pump casing itself does not get hot or transfer heat to the water that I am aware of.
They definitely add heat to the water. In the summer I have upper threshold on my three ReeFlo closed loops and if they kept going my temps would keep raising, even in the basement.