well yesterday i turned on my tank light and my discus freaked out and then laid flat on the gravel. he laid there for an hour then swam up, but its like he is a 100 pounds or something. he swims up and then falls back down like a ton of bricks and lays there. everything in the tanks is norm. all other fishs fine. he is still breathing like norm. well today he is the same. i feed the fish in that tank and he swam to the top and fell back down like a brick. whats going on with him. he has been like this for almost 2 days. if i dont fix it hes gonna go hungry. anyone have an idea what this guy is doing. thanks