Rivers to Reef
Despite the weird name, Joe's Juice works exceedingly well at killing aiptasia and majano pest anemones. Simply shake the solution and draw some up into the included syringe. Apply to the anemone without touching it with the syringe.
Rivers to Reef says: We use this to kill pest anemones in our tanks. Larger ones usually take a couple doses of this stuff, while smaller ones usually succumb to the juice on the first go. Make sure to turn off your circulation when applying Joe's juice all over the mouth of the anemone. You wouldn't want Joe's Juice flying around your tank willy-nilly. If the pests are in a high flow area you might want to leave the pumps off for a few minutes to let them stew in Joe's juice.