Some of the live rock in my tank was getting in the way so I took it out and hammered it to pieces. When I put it back in, it clouded the tank and some oil formed at the surface. My cuttle is now resting on the bottom of the tank, while it's semi-rapidly changes color from light to dark. After a while, it's lower mantle (everything below the fin) also did the same thing as the head. Is anything wrong?