Persistent Fin Rot

[Bettalover29]

So I have 5 girls in a 20gal. I noticed the fin rot a few months ago when I got back from vacation. Immediately did a 50% WC and added melafix and salt. It has been persistent. I've tried melafix, salt, Kanaplex, API General cure in case the fin rot was secondary to something else, Pimafix, Water changes and nothing is helping. I got aquarium plants to absorb any extra ammonia. I am at my witts end. One of my fish is close to body rot and I don't know what to do to help.

 

[BigManAquatics]

If they are nipping at each others fins, it won't heal.

 

[Bettalover29]

They're really peaceful towards each other. I mean they kinda chase each other for a second but then go back to their business. But I'll look out for it in case they aren't as peaceful as I thought.

If they are nipping at each others fins, it won't heal.