I have to say my carpet did not "go after" my fish, bad wording on my part. My fish got stuck on it, those things are very sticky and it took quick advantage. After bedding it's foot in the sand for about a month, my carpet went floating also and then attached itself in the corner to the glass. After that and the worry over the fish we took it back. I'd also be interested to hear if people who have successfully kept a carpet have experienced this. I just figured I didn't have the right environment for it to be happy in.