question about microbubbles?

[818reefer]

Hey guys and gals I have a question about microbubbles I got home from work today and notice my tank was full of microbubbles. My skimmer was acting up, its corrected now. though I noticed that a tricolor acro seems to have lost tissue at the bottom on one or two branches can microbubbles do that? seems like red bug bite marks. wierd. I hope I don"t have those bugs again. marks were not there two days ago. please need a answer. Thanks.