If indeed the anemone was playing surrogate to the clownfish, it very well could rehost. May I ask, what other inhabitants was the clownfish sharing the tank with at the lfs
? Were they bagged separately or together in a single bag? Although condylactis normally are not accepted as a host anemone, various corals, pvc
, and other mechanical equipment are not natural hosts either, yet clownfish still adopt them. Depending on what other inhabitants you have filled your tank with, the clownfish may not feel insecure in wanting that particular host any longer.