
Since yesterday, I see weird black markings on my flowerhorn, It was completely white and vibrant before.
I see it on his body and it seems like it's increasing, it's on the edges of his fins and tail too.
I have an heater set on 28 degree celsius, I did 50% water change, added a bit of aquarium salt as well, he is having fine appetite but I am worried about him.
I can say that he is sick and is hiding and got his fins closed, any help?




