I had some quick tissue and polyp loss on my tan montipora digitata frag when I placed it too close (3-4" away) to my pearly bubble coral. Then I moved it away and it recovered. Later, when I moved it near the cabbage coral (3-4" away), it started to turn white again (The side nearest the cabbage). Now, I don't put it close to any soft corals and it is recovering quite nicely. I read that cabbage corals can be toxic to stony corals so I guess this was what was happening to mine.
http://www.liveaquaria.com/product/p...=22&pCatId=638
[ 23 February 2002: Message edited by: Sam W ]</p>