hi my tank(55 gal.saltwater) was in a bad state (green water like a green hell)i found out the filter was bad. I bought a killer filter and it was working wonders, but when i saw my blenny he was as fat as ever. he is a lawnmower blenny. he swims kind of tilted from time to time, and he is always curled up when resting. i also noticed he breathes a lot faster. the thing that makes me worry the most is he(or she i cant tell,hints?) is shy. he/she was one of my most active fish in the tank, but now anytime i even enter the room i can see it hide. other fish leave it alone and it eats normally any ideas?