If its just the 1 aiptasia and you can remove the frag from the tank? Ide be tempted to just putty over the bugger!
Pep shrimps are hit and miss, some eat them some dont, i wouldnt bother for the one.
If you do decide to go the juicing route again ide remove the frag to do it, less chance of spores releasing back.
Aiptaisia can be a bother, you may have one for ages and no more. You might have one, atack it and have 100s sometimes cures work, sometimea they dont.
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