is he swimming stationary with the nose down or swimming forward like he can't lift his nose? They park themselves in a weird position...nose down. However..when they dart around or swim, which is usually quick...they straighten out. When are they in the nose down position? How MUCH nose down are we talking here? When they are sick..the nose down is exaggerated and they struggle to keep afloat and will venture towards the top of the tank.