I've got a Reef Octopus in my sump. Every time I plug it back in after cleaning / emptying the cup it has to be readjusted to get the level right. Shouldn't it just go back to where it was before since nothing changed with the valve settings?
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It should not need to be readjusted provided that you regularly clean the cup.
How often do you clean the cup?
How long do you wait after cleaning before looking at the foam head level?
I have never felt I need to readjust my skimmer after cleaning and I have used many skimmers. I also don’t turn them off for cleaning though.

