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Are there and tiny bubbles entering the return pump from the sump? Ofcourse, this would be easy to tell as would would see the microbubbles coming out from the return pipes.
My problem was due to the return pump sittin to close to the refugium and would ingest bubbles caused by the water coming from the refugium. I moved the pump away from the fuge wall and no more microbubbles.
Now I have white specs and cloudiness due to an explosion of copepods. They are everywhere and when they crawl onto the Koralia powerheads, they eventually get blown into the water column.
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