Quote Originally Posted by NaeKuh View Post
When i was messing with it, i turned off one of my pumps, and my temps shot up nearly 8C. The d-tek had less of a delta with 1 pump going. i think it was around a delta of 5-6C.
Forgive me for being untrustful, this is the most strange information. 8C because of 1 pump turned off? This implies you have extremely low flowrate with one pump, on the order of 0.1GPM, which is simply not possible.

Or the second pump, turned off, has so high flow resistance that it totally kills flow?