I am certainly no expert, but there are several factors that could influence the clowns. The type of anemone may not interest them. They may prefer a carpet or another kind. I hope you did not buy a condylactis anemone, no clowns will host in that. Another factor may be that the clowns were tank raised, and not brought up with an anemome for protection. I have had tank raised clowns that eventually do go intoan anemone. Third factor is time. It may take weeks or months for the clowns to decide if they want it for their new home. Hopefully they will. HTH