Careful around the zoanthids as they posess a toxin known as palytoxin. Do not get it near your eyes, or in cuts. Gloves are'nt a bad idea.
Bluecarpet, I would not get a peppermint for 2 aiptasia. Peppermints can be problematic if you want to add fun inverts like feather dusters, coco worms, etc. There are several products that will kill the aiptasia. One is Joe's Juice, then there is an Elimi-aiptasia by Tropic Marin. The best method I have found is to administer it by slowly 'sneaking' up on the aiptasia with the syringe. Then feed it out to it slowly, it will get a taste of it and will attempt to eat it. That is when I nail it with a good glob of it. Make sure if you get JJ you stir it well, as the solids settle to the bottom. Some people have also had success with boiling water in a syringe, lemon juice, kalkwasser in a thick paste, and also straight calcium. Never kill more than about a dozen or so in a day, as all the chemical added to the tank can cause an imbalance in parameters.