I was interested because I found and removed a couple (literally 2) tiny aiptasia in my new RSR750 tank that I thought was aiptasia free (grumble). I am well aware that there certainly are some I'm not seeing, but should be very few.
But in reading more about Berghia, they aren't recommended unless there is at least a medium severity outbreak or else they can starve before they find any aiptasia to eat.
I did add a few peppermint shrimp a few weeks ago when we had that group order, but never saw them again after day 0, so they are presumed dead.
So I guess I'm back to just manual removal when I see them like I've always done...