Possibly? I’ve taken out the skimmer and checked it for clogged sponge, missing cover, etc and I didn’t notice anything like that, but I’ll go ahead an check again now that I know what I’m looking for!
or something where the connection between the skimmer and the outflow is partly loose - what doesnt make sense is that it happens with feeding. I agree with Daniel - turn the skimmer off and see what happens. I suppose it could be some kind of reaction with the food and your water - as compared to the filter.
I do not agree completely with 'rinsing' frozen food - as when you do that - it does remove some trace elements, etc - as well as small particles that can feed your coral. Also - mysis shrimp alone - is not really a balanced diet. In any case - Seriously - talk to the manufacturer of the tank - It seems to me you are missing something 'easy' - that they could help you with - that 'we'- without seeing the plumbing - cannot?
I know it’s not, I also feed pellets and LRS foods daily. Mysis is just the morning meal :). Between the 3 tanks I have 4 clowns, a blenny, and a geo hawk so it’s not really that many fish either. I’m leaning towards it being a skimmer issue because two of my tanks run the same skimmer model and both have the same issue, it’s just a lot worse in the 20
