I have a Dojo in my ten gallon with another Dojo and a bala shark, a rainbow shark and a striped Rafael catfish. The littler of the two Dojos is either getting eatin by something or we just found out we have an ammonia problem. What could it be? There is a little discoloration where his "wound" is. it is alot paler than the rest of his body and when he tries to swim only his upper part (non-discolored) moves. I don't know if that could be a sign. and when you set him in the water he just floats and then flips on his back. He tries to eat, but has a rough time do you know of any cures? He has a little cut on his side where the skin is peeling off. PLEASE HELP!!!!!!!!!