Our Blenny got real skinny and everyone said we would lose it within 6 months due to starvation. I took Skips suggestion of placing a small piece of LR in a jar of tank water in the window to culture algae then put it back in the tank. Unfortunately I failed to get it to grow fast enough so I gave up. Then one day, my Blenny figured out how to eat the Nori off of the clip and now he eats everything I put in the tank....pellets, flake, frozen....anything he can get his mouth on! He's fat now and we've had him for a year and a half. Hopefully yours will figure this out before starving to death too! Good luck!