Weapons, this is a very old dead thread. LIKE 10 years old.
the only way eradicate them 100% is to nuke the tank. other than that, you will just have to control them. methods of control are :
1. chemical. hit them with aptasia x when you can see them. can kill the one you see, wont kill those you dont. other chemicals can do this.
2. Electrocute them - majano wand kills with electricity and a reaction that causes the cells in the anemonee to fill with hydrigen and burst. you have to kill everythign or they will return. Again, you will only kill what you can get to.
3. Biological. Get something that eats them. Peppermint shrimp are known to. Aptasia eating file fish are known to. Berghia nudibranch are known to. Copperband butterfly is known to. Still, they wont eat them all. they keep coming back. I had a Copperband for 3 years. he ate all in the tank, but since i had some in the overflows and plumbing, the spores were still around. I moved tanks and consolidated into a smaller tank. I then sold my Cbb after months. a few months later, I noticed the anemones came back!.
once in a tank, unless you catch them so very early on, they are next to impossible to eradicate.