I was just having an interesting discussion with a LFS owner and wanted to hear from others on this issue. Apparently an issue has been arising from some of the Bali and maricultured rock base used for alot of sps we buy. The problem is that sudden death starts at the base of the colony for no apparent reason. After numerous ideas the found that after breaking open the rock base it smelled worse than raw sewage. On each effected colony it was the same, the rock base smells rotten. This is after they have been in tanks for a couple of years. The LFS owner is no reccomending that if you buy one of these corals with these base rocks uses (especially the hollow ones with the plastic plugs under them) to cut of the sps colony and glue to your own live rock piece. i find this to be an interesting finding and would like to hear if anyone has experienced this.