I have a german blue ram in a 46 gallon, lightly planted tank that is ill. Both of his eyes are popping out, and there is a larger bump on the middle of his head that is pinkish. He is breathing with some more difficulty and swimming on the the bottom only. I added a half dose of aquarium salt to help him breathe. This is only two to three weeks after treating him for pop eye. From the last time he got some minor scars. The tank contains a hi-fin leopard pleco, chinese algae eater, 3 cories, him and his girlfriend(rams) both are around max size. The water perameters are normal, the pH is 6.8, hardness is 25GH, nitrite 0, and nitrate 5ppm. I need to add some tap water to get the buffering capacity up. Any suggestions on treatment?