My albino Cory has his top dorsal fins down to nubs. I don't see any spots or discoloration on his body that would indicate fungus. Been doing 20% water changes three times a week and using stress coat+ but no improvement. He's still very active. Eats, swims around. But he'll breathe really hard at times and position himself in ways that make me think that he's dead but then he swims away. No problems with any of the other fish in my 10 Bought some melafix to help regrow the fins. Is it safe to use on my whole tank? Or do i need to quarantine the Cory? And can I use it together with stress coat+? Stats in signature. Water readings are 0,0,4.Tank is cycled. I've had this Cory for several months now.