Hello Fish Lore Folks, I am new to this site and seek help from those of you who can. A couple week ago one of my discus turned a dark color and stopped growing, it eats swims with the rest of my discus. It occasionally hides on its own and does something weird with its gill from the looks of it seems like its pushing water of them very intensely. I'm not sure if Fish Lore has a disease question that I can fill out. Parameters: ph: 6.8 Nitrate: 15 Nitrite: 0 Ammonia: Ideal [Safe] Stress Harmful Danger I used Kordon Rid Ich for a week ( I was told it can help with bacterial diseases) I used Aquarium Salt for a couple of days I tried Garlic in their food Nothing seems to be helping, Am I missing something. Any input will help me tremendously. Thank you for you time in reading this!