Hi, I would like to remove GSP from my rockwork. Mistakenly added it a couple years ago, and now taking more territory than desired, along with killing other corals. Is there a decent way to remove quite a bit of it from the rockwork? I trim and pull batches off every now and then, but grows back. Has become a frustrating endeavor. I would like to add other corals in its place. I'm unable to pull the rockwork from the tank. Almost as bad as some zoas that i have too (another menace). Thanks for your time and advice.