so i recently bought a powder blue tang on saturday, after i got it to acclimate its started eating the first day when i first brought it home there were little signs of ick on the fin as each day goes by im starting to notice ick showing up but it still eats like a pig so today i went to petco and got it some garlic extreme and fed it that also, should i be worry that it would stilll get sick later on during the week or what not? i mean he still eating like a champ i also have another yellow tang in there and the yellow would sometime chase him around is this what is causing him to stress also? but they are starting to get along, what should i do?