I bought a small piece of rock with Orange Zoas on it from my LFS. I have had it for about two months, and I haven't really noticed it spreading at all. They told me with the Metal Halides that I have that these would spread rapidly....I know rapid in the Saltwater fish tank world could be months, but I was just curious about how long that should take. There is a picture of the rock/zoas in my galary, but it won't let me post it in this thread...sorry its kinda blurry it was taken from my PDA. I feed the all of my corals cyclopse and phyto-plankton at least two times a week. Any suggestions on how I can speed up the process?