My clown is a saddleback ( not tank raised). He took to the long tentacle the first day. I've heard from many people, that tank raised clowns are very unpedictable that way. Sadly they may never take to an anemone. One fellow I talked to had a tank raised for 3 yrs who never took. Your best bet, if you have your heart set on a clown/anemone pairing is to buy the set when you see them together in the store, or maybe get one that is not tank raised. Patience is a virtue, though.