i have read abt hard coral and soft coral from various book, however i stil don have a good idea abt their differences. i only knoe tat they are actually under a same group "cnidaria", and hard coral is more difficult to keep than soft coral, and thats all i know. i would like know more abt them before i start stocking. is buble coral a hard coral? soft coral can pack more closely to one another? is my 14000k mh light enough for both soft and hard coral? someone pls help me.thx