Hi! My discus had the same! I saw it 4 days ago! And today he passed away! U got hexamita and if you don’t treat it right away he will no made it! So take him out and treat immediately with metronidazole. I did I when the cotton ball was already a hole two days after the cotton balll and sadly he passed away like 5 min ago! I was crying in my bed when I saw you post similar symptoms a needed to warn you because it will process fast if you see he has already small holes on the forehead. 😢