Hi I need some help, about a week ago my son put a hand full of change into my 60gal cichlid tank. As soon as I noticed it I pulled all the change out or so I thought. I missed a dime that had got covered with gravel. I noticed my fish looking sick and they started getting a slimy film on them so I did a 50% water change and dug in the gravel and thats when I found the dime. I dont know what it is to treat it so I am asking for help. It is affecting all my fish but its most niticable on my albino tiger oscar. I have attched a pic of my oscar and you can see air bubbles stuck to the slime. I have also noticed the right finm on 2 of my cichlids looking all beat up along with my plecos fins looking all jacked up. pls help.