I emailed support my invoice and address as well as the issue.
Coolant was only ever DP ultra clear. Pump was possibly defective, not sure. I recall seeing a lot of particles when I built my loop that I attributed to bubbles and these particles eventually settled into the loop.
I only now realize when I'm cleaning the loop that they were not bubbles but fine ceramic dust from the bearing.
My other bitspower cuboid pump runs no issues. This one must have been broken for some time, so I didn't notice it until now.