peppermint shrimp have worked really well for me...make sure you are actually getting L. wurdemanni and not R. durbanensis – Commonly known as the Camelback Shrimp.

I have also had great success wth red sea aiptasia-x, it has worked better than the other comm. brands.

Ray

Bought 4 bergia which I believe we're taken out by. Sallylightfoot
Bought peppermint which were taken out buy hawkfish.
Bought copperband who didn't touch them
Bought file fish and cleared out heavy infestation in a week

+1 filefish :P

i had a filefish that ate all my zoas then went after my bubble tips, i have peppers now that are doing the trick, filefish and ccb only eat the heads off once the fish is gone the lil buggers start popping up again peppermints and nudis are to only things that eat everything so they never come back again, any kalk paste will melt them after they spit out a ton of seeds so pick your poison and try all you want there.

I'd try peppermints first, everything will be hit or miss but these are cheapest solution and typically a nice addition regardless. Never heard of peppermints eating clams but have heard of several people buying camel backs by mistake which are not reef safe.

If you like the file fish as an addition to your tank anyway then perhaps a good choice to start with as well. If not then peppermints first but keep in mind they will not eat large aiptasia, the idea is to manually kill the larger ones and the peppermints will prevent new/smaller ones from spreading/growing.

Agreed with the PPMS, I haven't seen a glass anemone since I added a couple shrimps to the tank.

aptasia
 

scoop them off the sand during the day either before or about 2 hours after feeding so they don't spread.never do this at night or just after feeding.did you get your sand from someone?if they are in the sand your live rock would be covered as they like to be just off the sand bed in a flow area