So...one of my favorite fish in the tank is my lawnmower blenny. And before everyone goes on about how they starve after the algae is gone, I know lol. but I have more than an abundance of hair, slime and other algaes unfortunately! he just does not seem to care about any of it and now he is getting very skinny. He eats flakes/frozen and loves it but never seems to get any bigger in the stomach (its sunken) what can i do please help?