I'm sure similar must have happened to everyone else here. Looking through the community tank at the local lfs and spot a sps colony upside down in the sand. When I ask the owner about it, he claims he couldn't get it to stay in place and it had "disappeared"and wondered where it had gone. "Gave" it to me for $5! Good size, fluorescent green and brown, looks like a Pavona (lfs called it a "Cactus") but the problem is half of the tips are dead from being buried in the sand. Everything else looks good but now algae is starting to grow on the tips (uggh, brought hair algae to my tank) and I'm wondering what I should do? Cut dead off, leave it, or what? I took a toothbrush and carefully scrubbed the ends to remove the worst of the algae, but don't know if that's okay or not to continue. While post a picture as soon I figure out how.