I used to get a lot a micro bubbles with my Remora when it was new but there are none now. Also, after I clean it there's micro bubbles but after a few days there's nothing. If you give it some time they will probably disappear.
Beware of anything in your tank with any kind of oil residue- when I changed the foam pads in my filter it literally didn't skim for almost 6 weeks (and I had rinsed them well). I did water change after water change and was starting to panic but it did kick in again eventually. At the time I was really unimpressed but all in all, it's been a good skimmer for what I have (46 g).
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