I have tried posting in other catagories but I am not able. Hopefully someone will read this and help me out. I have a 10 gallon hospital tank set up with my common pleco in it. It looks like he has a type of "body" fungus growing on his fin. I took pictures and showed them to my LFS and they told me that it was a fungus. They told me to treat it with Maracyn and Maracyn Two and it should be gone in a week. Well I am starting to worry. I have been treating for four days now (not long I know), but my pleco doesn't seem like he is getting any better. The fungus looks like it is actully growing. The LFS told me not to use any filtration. I got home from work today and you can't even see into the tank. I did some research and it says that you can use filtration as long as you don't use any carbon. So now I have a carbonless filter going to see if I can get it to clear up. There is also a slim on the inside of the glass which I am thinking that it is from the medicine. Can anyone help me with my situation? Am I doing this right?