I have one fish that has "cotton" on and inside his mouth. I am going to quarantene and use Maracyn Plus, add salt, and turn down my temps....My question is this... I have two plecos, 2 yoyo loaches, 2 red fin borleyis and a peacock eel.... Can all of these species of fish tolerate this kind of medication reguiment?? The reason I ask, is that if more of my fish come down with this, I was thinking about treating the whole tank, if these fish can safely handle the medications... I'm mostly concerned about the plecos and the peacock eel, as he is considered "scaleless", correct?