well...ive never really liked the way saltwater tanks and fish looked...but now ive kinda changed my mind...some neon velvet damsels caught my eye at the LFS yesterday. now, i know nothing about saltwater tanks and fish, but id like to try it out (not necessarily now, but maybe in the near or far future). anyways, the guy at the LFS told me i could have 2 in an 18 or 20 gallon...was he right or was he wrong like most LFS people are? will 2 neon velvet damsels get along in an 18 or 20 gallon tank? another question- if i were to set up a SW tank, what special equipment would i need? do SW tanks need special lighting? i was also thinking about keeping live rock...what does it look like exactly? is it expensive? i might come up with some more questions later on, but these are all of em for now. thanks in advance for replies.