Not to be a bearerof bad news but arn't those carpets known to be fish eaters? Other than the clowns, of course.
Even tho..that carpet is a very cool color, pardon the pun. lol
I know they are fish eaters but if a fish gets caught and eaten that would be the way nature works. I would hate to lose one of my fish to it but that is the risk you take when you own a carpet. Also yes tey do get big mines about 12-15 inches already and that is how big it was when I got it.