I came to my parents house this weekend and my dads Albino Tiger Oscar is just staying up in the left corner of the tank not moving. It will come out to eat a little bit but that’s it. Otherwise it just sits in the corner not moving. I looked at it and I think it may have fin rot. It hasn’t been growing either. My dads other tiger oscar was the same size but now is about 1/3 bigger. Can you please help us figure out what’s wrong my dad really likes the Albino and wants to save it. It’s a 60 gallon tank with African Cichlids and the two Oscars South American Cichlids. He had a canister filter, water levels are all good and all the other fish are fine. I will attach a couple s as well. Thank you in advance!!!