So I'm pretty sure my Senegal Bichir(~6inches) has an internal parasite, white stringy feces, and has been weired about eating, sometimes he eats all his food and sometimes he will go for it and then doesn't want it. I have some medicated food but its for smaller fish and he doesn't even notice it, anyone know how i could get him to eat it or if there is something better out there for bigger fish?