i had a clown in my sump for 4-4.5 months and it would surf the top of the water and his top fin would stick out of the water and that part of the fin turned white and would keep dieing off and growing back, but when he was down in the sump he would collect alot of bubbles all over his body and i watched him when he had the bubbles he treated them like parisites, he would slam hiself aginst the rocks i have down there and would get alot of them off..IMO he did this becuse they bothered him so how can it be non harmful to them, i had him down there becuase i friend brought me another goldstriped maroon just like him but the new one was much larger and i added him anyways and the new one almost killed mine after 2 days of fighting, i put him down there to heal and he did heal but it was torture down there for him, he didnt act right swam at the top for long times and his top fin would rot off from being out of the water for so long..but now hes back up top with the bigger one again and has been for 3-maybe4 years and in that time ive done alot of "testing" with maroons ive learned alot from my own experiments. ANY ways my point is do your best to get that micro bubble problem fixed...it cant be good for the fish, AND!!! your tank will look alot clearer...its kinda like when you clean your glass...if you skip cleaning the corners becuase they are harder to do it dosent look as clean as when you take the time to clean what little bit is there
