I have a discus that is full grown – 2 years old and 6″ long. Reecently some large white bumps appeared on his head between his eyes. He is listless and stopped eating and hides near the bottom and back of tank. I’ve looked at pictures on the net and the only thing that looks close is hole in the head. Would this be your opinion or would it be something else? If so what is the absolute best treatment?
Holes in the head is because lack of minerals.
Adjust the diet with minerals.
There are probably worms in the holes.
Apply Formalin at 2-3 ml/100 liters of water.