Closed loop causing many micro bubbles

[Buccaneer]

I hope you did find the source of air input but I am here to tell you that I have personally had cavitation on a 4MDQX by using 2 X 1" outputs and had microbubles and by changing to a single 1" output it eliminated them altogether ... do a search on cavitation or microbubbles if you dont believe me on RC or elsewhere ( something about high pressure and low pressure freeing up air bubbles in the water )

Cheers