I have a 6 in long 4 year olg plecko, just about a month ago I noticed a slimy looking white patch around his eye, I asked the fish store what to do so I tryed an antibactieral, and fungal treatment neither did a thing, 2 weeks passed and its starting to spred, but none of the other fish look sick including the other plecko,any ideas. he/she also has greenish looking kelpy stuff about 2 cm growing from around its mouth been there for 1-2 years now any ideas? 


because the indian resturant near here has a 7 foot tall hex gold fish tank with one in cold water of course ....