I would look up Majano anemone. They are a pest anemone. They look cool and all but just like aptaisa, they reproduce like crazy and can soon take over your tank stinging all your "wanted" corals. Get some Joe's juice and nuke those suckers!
Yup. 2nd the Mojanos. I left one in my tank about 3 months ago, it has now split into 3! They multiply quickly. I've used Aiptasia X to get rid of them.
+1 for Aiptasia-X I found it to be the easiest and most effective manual control of Aiptasia & Mojanos. On LR that can be removed from the tank easily, you can use a pair of tweezers small screwdriver or a butter knife and pop the lil suckers right off. Unlike Aiptasia they remain intact when removing this way.
You don't have to buy anything. Boil up some water and squirt it into the Majano mouth with a hypo or similar. The hotter the better. Boils them into soup. I have offed hundreds this way.
You can get hypodermic needles at your local pharmacy, most of the time. I know sav-on pharmacys at albertsons will sell them. Something like 45cents or so a piece.