Well last week i treated my Cichlids with Maracyn for Fin Rot. They all got better, but yesterday they started acting very weird. All the fish in the tank are having what appear to be convulsions. As they are swimming or staying still they shake. Not constantly, but every few seconds they convuls and then keep swimming. Does anyone know what this is or how i can treat it. It seems like something nurological. Thanx in advance.