I am treating my sa cichlid tank for ich, by raising the temperature and adding salt in slow increments. Yesterday I did a 100% WC, and got really good results. Today, only two of the fish even show signs of ich, and a little at that. However, I have noticed that their fins don't look too hot. My severums and oscars expecially are showing this. It seems like the fin is being eaten away, leaving only the hard rays. I do regular water changes 2-3 times a week on all my tanks, and ammonia, nitrite=0 nitrate really, really low. I don't believe it is fin rot. Can it perhaps be the salt? I am packing about 2 tsp per gallon right now. I'll post pics if I need to.