I have 2 discus in my 30 gallon tank. Just recently I have noticed one is dominant. The less dominant fish is still managing to get lots of food, although the other tries to prevent that. I feed them 2 very small sprinkles of food per day. I use to wait till they finished one, then added another. Today I tried adding both sprinkles @ once on different sides of the tank. There wasn't much difference. They are both turquoise. The dominant one is georgeous. The dorsal fin extends from the body & the colors are vibrant. The weaker one has color, but not like the other. It often has its dorsal fin clamped to its body. ( not always ) Does anyone have any idea how I can stop the friction between the 2 ?