Well this is going to be hard to describe but ill go for it.
The pump im using has a housing just of the impeller, there is a metal plate that seals this all up, and I can take hte plate off to oil the impeller, unclog things, and anything else.
So it will DEF not add heat to the water, the motor is about 2-3in away from the impeller inlet/outlet housing.
But what If I put a NICE heatsink/fan on that metal plate?
Think it would help at all? Maybe if my pump was pumping the hot water?
It would look cool as hell