[suckafishtankcleaning]

i got a filter sock on my protein skimmer/ refu. and it stops the bubble there (and hell yeah those things kick ass) but the air bubbles are comin out of the powerhead. and the powerhead is connected to the overflow box to keep the syphion going. its used in place of an air pump the draws air in.

but i will try to add more water to my sump or turn up my return pump. but much more water and the sump will over flow if power goes out.

it looks like the air is getting in to the box from take side intake, the fish screen is creating the air bubble, but they are big ones till they are takin in by the powerhead.