If you have a big enough tank, there are some fish you can get that will munch on it. Coincidently, I'm just in the middle of a break from ripping my whole tank apart to get rid of the stuff. Trust me, I know your pain. I had to pull tons of the stuff out every week, but it keeps growing back thicker. If you have a lot of it already, IMO a fish wouldnt be able to keep up with its growth. I've asked the same question you're asking right now and never really got a good answer, other than to pull every rock out one by one and pull it off manually. If you're willing to do that I can give you a few pointers.