the best thing really for them is to host in a nem.....generally speaking clown/coral relationships dont usually work out so well.....either for the clowns (in your case) or sometimes its the coral that suffers....
what kind of clowns and what kind of nem do you have?...hosting is a learned behavior....try putting a mirror by your remaining nem to encourage the clown over to the nems spot...or, and this is gonna sound silly but, print off a picture of a clown hosting in a nem and tape that to the side of your tank.....Ive read that this can sometimes work....
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260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065, 2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa). http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here http://www.vimeo.com/2304609 and here http://www.vimeo.com/16591694
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