It really varies how long it takes clowns to host an anemone. Some take to it right away, some seem to never really like to host them. FWIW, I've basically scared clowns into anemones for them to take to it (don't recommend it, might be against BAR mission) and I've heard of ppl taping a pic of clowns hosting in an anemone against the outside glass (picture facing in) to help "clue in" TR clowns. No clue if that really works. IIRC, it's better to feed anemones smaller-sized foods like mysis size and smaller. Something about a net energy loss and whatnot, you'd have to ask Gresham for the details

. But I'd definitely stay away from whole silversides and would opt for minced silversides if you had to keep feeding them that (would really prefer mysis and other, smaller foods). Basically what I would feed LPS.