My pleco has hole all in his fins. The outline of the fin is there, they are just full of holes. I do bi-weekly waterchanges, keep the temp around 80- 81 degrees, and feed him algae wafers every other night. This is the second pleco ive tried in my tank, so im a bit frustrated. I dont think its fin rot due to the completeness of the fin outline. Any ideas? If this pleco dies as well im going to try a different tank cleaning fish.