fwiw-i've seen many different species of clowns 'adopt' different kinds of hosts outside of their 'natural' ones-from elegance,colt,bubble corals to various anemone species, to fake plastic freshwater style plant decorations. 8O :wink:
(don't think you'll have a problem!- though there is a chance that you'll add the anemone and they'll choose a powerhead!-seen this happen,too)