I got an error trying to play the video...
Are they micro-bubbles? If so, on a previous build I had a strainer inside the return section of my sump screwed into the bulkhead leading to the return pump. The movement of the water through the strainer caused micro-bubbles in my DT (there is a scientific name for the phenomena that I can't remember). Once I removed the strainer, no more micro-bubbles...
Last edited by VoltzNSalt; 12/20/2017 at 08:12 AM.
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