clowns will host whatever they want to... torches, frogspawn, hammer or anenome. Best way to get hosting clowns is to buy them that way. People/shops sell clown/anenome groupings. If you already have the clowns and anenome you might try putting a picture of clowns hosting on the outside of their tank(some people say it works) Otherwise you just have to wait and see if they figure it out on their own.