the bubbles never go away as far as im concerned i have had the skimmer for almost a year now i just use a sump sock on the return and that gets rid of them. there is a pre filter box that is supposed to help but from what i have read it is not worth it. The sump sock is an eysore if the skimmer is on your display but it is way better than having a bunch of microbubbles floating around.
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