Keep an eye on them. They may be down but not quite out yet. Give it a couple days and youll see the clear pointy tentacle brownish/purplish kind can be taken care of by peppermint shrimp. i've had several that have. Love it....
I use the method and it works....HOWEVER, I inject it into the aiptasia, and have about 75% successrate. I don't just aim and shoot. The other problem is that sometimes those floating chunks that you see, become little aiptasia.