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- Mar 16, 2017
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Bubbles on the chaeto is good unless it's actually bubbles on cyano or dino on chaeto. I agree that you must have very little flow on the surface of the water. I don't have a powerhead in my fuge but the speed of the flow through the sump and over the baffle keeps the surface moving quickly/skims the surface. I think a powerhead should solve your issue.
I have a powerhead but it's not aimed at the surface.
I will reorient it and see what happens.