I want to put something over the injection chamber of my remora to quite it down some. I had originally cut a majic eraser sponge and plugged it up and it worked great, but my wife said that she didn't think that it would be safe for the tank. I couldn't find anything on the net about it containing any chemicals but now I'm paranoid. A few days later my wife came home with a cheap sponge she picked up at the store, but on the back it said that it was not aquarium safe. I was thinking about getting an aquarium floss pad and cutting it to fit. Suggestions?