Looks like fin rot and it is easily treatable.Hi I Think My Betta Is Ill, At The End Of His Wavy Fins It Has Gon A BrownyBlack Collour Like This Picture View attachment 46126 is he Ok? If Not Can it Be Cured/ Can it effect my other fish? what shal i do with him thanks
HELP PLEASE
I guess its a cory and yea you should have more but you cant fit any anyway im guessing what you mean by "hes fine" but thats for another time. You need to have a test kit. You need to medicate for fin rot, however, in the future it can be prevented most of the time by good water quality. Next time you notice any frayed edges do a large water change. Also do a large wc before treating.tankmates- 1 bottom catfish (hees fine)
size - around 3 gal
and not sure about parament