I am still researching the setup of my first reef tank. Two books read recently have been very informative. Ultimate Marine Aquariums, by Michael S. Paletta Reef Secrets, by Alf Jacob Nilsen & Svein A. Fossa Since a lot of practical information comes from fellow hobbyists, I ask your advice on starter corrals. My thoughts are: Pulse Xenia, Xenia Button Polyp, Protopalythoa Mushroom Anemone, Discosoma Button Coral, Scolymia Leather Coral, Sarcophyton dura Sea Mat, Zoanthus Hairy Mushroom, Rhodactis Kenya Tree, Capnella imbricata Clove Polyp, Clavalaria Blue coral, Heliopora coerulea Since I can't find any guidelines on stocking rates, like they do for fish, IE. 1 inch of fish for every 5 gallons of water; how do you know how many to stock in the tank? Since some are listed as 'semi-aggressive' how do you keep them from bothering each other as they grow to full size? How do you know if they are compatible? Regards