I have a tank of 7 blood parrot chichlids. They have been fine for many years. We got them when they were tiny, about 2cm long, and now they're huge! Anyways, they have stopped eating recently and their fins are noticably damaged. They don't really fight each other, so it can't be due to a fight. A long ago, they stopped eating before but we used Mardel CopperSafe fish treatment and they quickly started eating again. Now we've been trying copper treatment because we think there might be some bacteria that is corroding their fins and making them feel sick (not eating). I'm no fish expert and I don't know what's wrong and how I should treat this, can anybody please give some insights, thank you very much.
Some additional information: we use tap water with table salt, but it has been this way for many years and didn't really seem to be a problem.
Some additional information: we use tap water with table salt, but it has been this way for many years and didn't really seem to be a problem.
