Its definately fin rot. Id use a combination of both Pima and Melafix. Melafix is a remedy for bacterial infections, while Pimafix is more of fungal remedy, but also works as a preventative.
omojena;3014673; said:your silver dollars are chewing on him.
bartzenegger;3015441; said:sorry man i got to disagree with everyone . it looks like to me he got picked on . my guess the another aro. i had this same problem . the fins took sometime to grow back . the fish must be in a stress free enviorment with a little salt . i have 2 blacks . the beat each other up . the less injured healed quicker . the other is better but not back to normal. they are in different tanks now!