120 gallon, 9 discus in total, one fire eel and two angels. I thought he scraped himself on dragon stone in the aquarium or some of the drift wood. Just in case, I treated with General Cure for 10 days. But it doesnt look like its getting better. Tank water is perfect. I do weekly water changes. 20-30 gallons. Ive been having a string of bad luck with them for the past 4 months. Ive had him for more than three years. I’m really confused by whats going on.