Agree with boehm742, patience. have two onyx that hosted nothing but pumps, heaters, etc. got xenia growing wild and they finally decided to host that once it started growing onto the back panel of the nano tank and the colony was over 10" across. now they have been moved to a 46g bowfront and have returned to hosting pumps, heaters, etc...ignore the xenia altogether. Anemone coming in the future, but will not hold my breath on hosting.....imho if the clowns are tank bred, and several generations of such, they may still have the instinct to host, but it doesn't "kick in" quickly...of course, they may also be looking for an anemone that is larger than a small colony of anything.....(the xenia was over 10" across before they hosted it and had invaded part of their hosting teritory)...pure guesswork on my part, but.........there it is.