I made a stupid mistake and decided to clean off some rocks with a dish sponge. I guess a chunk came off because afterward I noticed a chunk of sponge stuck in my toby puffers teeth and mouth. He kept eating so I thought he was fine. But now he is constantly hiding ( which he NEVER does) and not eating (he never misses a meal). I'm afraid he ingested some. Is there anything I can do to help the poor guy out? I feel awful.