Five days ago, three of my guys had suspected fin rot. One I am very happy with his progress. The other two I've stll got questions about... (ammonia and nitrites are both zero in their divided tank) Because there were three guys that were having problems, I treated the tank with Maracyn 2, which the box says treats finrot and sepcemia (suspected in one guy), and today was their last dose. I have also added salt in the water.
Crash is white, and five days ago, I noticed his tail was shreaded and was also bright red, like almost bloody looking. Yesterday, it looked alot better and it almost seemed that the fins had fused back together. The red was also almost totally gone. Today, one of the rays in his tail is back to being bloody and his fins are shreaded again. What should I do for him?
Blaze is my other guy, and there was some question of whether he was biting his tail, having issues wiht the filter, or if it was finrot. I have finally gotten a decent picture of him, so I will let that do the talking.

Any imput on Blaze?