ok I have a 10 gallon fish with
3 zebra danio
4 Neon Tetras
It seems my betta was heaking and getting better from fin rot now his tail is seeming to be getting it back I dont know why the tank is cycles I do have a 1.5 gallon tank,but I dont have allot of waer conditioner,and the heater doesn't keep the tank warm like the 10 gallon tank heater does. The tank heater keeps the fish tank a 78 degrees F. I just added some Melafix to the whole 10 gallon tank so what do I do now? Partial Water change? here are some pictures please help,and its only messing with his back fin and nothing else is he biting it at night or are the other fish nipping him or is he scrapping it or is it fin rot.