Aptasia

[Hangfire]

Taking the rocks out of the tank sounds like a real pain. All of them are on different rocks, so it would mean taking out half of the rocks in the tank, and possibly killing all the other great stuff that's living on them - one of them has a great feather worm colony that's really grown in the last few weeks, plus a green sponge that just appeared (or I just spotted). I think I'll leave taking the rocks out as a last resort.

[Captainhemo]

I wasn't suggesting basting the entire rock, just the aptaisia. Put the turkey baster directly over it and let some boiling water deal wit the aptasia then try to suck up all the remains.
Lots of people do this in the tank, I only sugested removing the rock to lessen the chance of spreading any remains around the tank.
If you don't like that idea, you could try njecting them with lemon juice, many ppl have good success with that

[Reefer Rob]

Peppermint Shrimps actually did work for me, but it's hit and miss. I put 3 of them in and never saw them again. They did nothing. A few months later out of frustration I got 3 more and in they went. They too completely dissapeared... for about 2 weeks. I thought great, more money waisted. Then I was looking in the tank one day and I realized I had no Aiptasia. They had done it! I've been Aiptasia free for about 4 months now.

[fishytime]

Boiling water or lemon juice in a syringe. You need to be fast and accurate with the syringe as they will quickly retract into the rock when you try and poke them.

[Hangfire]

Lemon juice would hurt nothing else in the tank? If it doesn't, that sounds like a great idea. I do realize that you (Captainhemo) didn't mean to boil the rocks . I'm just not sure I want to try and pull out most of the rock in my tank. I might try the lemon juice.