hmm this is a good thread. Lots of things to think about. For one zeo is specifically used for the coloration of sps corals but there have been people who use zeo on sps systems with lps and the lps become brighter in color. I think that using zeo on a primarly dominated ric tank would not be good due to the fact that zeo requires heavy feeding and alot of skimming that ricordea and yumas do not like but, i have no exp using zeo so hopefully someone will chime in who has actually used it and gotten results.
