I was doing some cleaning in my tank, when i saw him. He was hiding behind the filter tube and i saw he was very swollen. I took him out and his eyes looks like they gonna pop out.
his belly its also very swollen. I want to know if this is because a parasite, or something like that. right now hes dead, and i dont want any other fish to die. i have sand as substrate in my tank, it can be some impaction like with reptiles??
sorry for my english, its my 2nd language