Suggestions? Torch coral NOT impressed

[pulik]

My Percula Clowns - or at least one of them - has decided my Torch Coral is nice and cozy. The fish has been in there nuzzling the coral for a week or so now, but the coral's NOT amused! It's not extending fully anymore. I moved it, thinking "out of sight, out of mind", but the Clown's a persistent little brat. So, question is, what could I replace the coral with that would tempt them enough to desist? I read about the Toadstools, but my tank's only a 20 long - soon to be upgraded to 30"x16"x20" (approx. 37 gallons). I'm thinking about moving the torch out for a bit so hopefully the clowns would attach themselves to something more willing.... Just not sure what?