skimmer
I once changed the sponges in my canister filter and my skimmer didn't produce any dry skim mate for months. Something to do with the oily residue on the new sponges, even though I had rinsed them well before inserting them. Eventually it worked itself out as yours probably will if you wait it out. Until then you'll have to do some extra water changes.
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65 g mixed fish with various lps, 50 lbs live rock, remora skimmer, 2 A150W sky blue Kessils
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