On sunday my redtail catfish died with a white slime on it it happened suddenly and over night by the time i saw it was to late this morning i left the house and the oscar was still fine acting normal when i came home he now has the same slime as the catfish and i am very worried he is in a 50 gal tank water temp 82 degrees ph 7 nitrates 30 ammonia .50 i am not sure what this is or how to treat here is a picture.
