the only problem with trying to inject the nems with anything is actually piercing the nem with the needle.....can prove to be easier said then done.....Ive had good luck with TA aiptasia destroyer....you dont need to stick the little buggers with a needle, you actually feed it to them....
Oh and just an FYI.....Red Coral has proven aiptasia eating peppermint shrimp atm.....I will feed them one in front of you if you like
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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