Just got this guy yesterday and he had no signs of any problems and today when I get home from work I see this. Part of the dorsal fin is completely gone with several of the spines now unconnected. Surprised to see it move so quickly if it is just fin rot...is this something else?
I have quarantined, but am wondering if I should do anything thing besides Pimafix...

I have quarantined, but am wondering if I should do anything thing besides Pimafix...
