I just clean the protein skimmer out. it was running good, but after I clean it out. It making a pulsing sound. It is common for vertex pump to does it? And how long I have to wait for it to come back to normal. I only clean with toothbrush. Any suggestions with help... I move the white tip far out, but I have to close the out flow to barely any water for the bubble up near the middle of the protein skimmer. I just feel it weaker than before.
