Please help, I don’t know what to do Recently Mushu has been moved out of a 10 gallon divided tank with 2 other Bettas, needles to say it was a bad situation. One of the other Bettas in there was also unhealthy and died. Since then I’ve moved him to his own heater/filtered 5 gallon tank and he definitely perked up a bit. (The other betta that was in there is in his own tank and is happy and healthy) .. But lately he’s been acting a bit lazy, laying on the ground and on his leaf hammocks. His fin rot is back, but I’m pretty sure I know how to treat it. And there’s also this weird stuff on his back, it doesn’t quite look like Columnaris, and it’s been appearing very slowly for the past month but it just now starting to look pretty bad. I’ve been doing frequent water changes, about 25-50% every other day. The last change I did was a couple hours ago. (I’ll get water parameters in the morning) What could be wrong with him? What can I do to help him?