here's a piece I wrote up fro killing aiptasia, but it should give you a good idea on the mixture. Anything it touches will die, so if you put it on the face of a polyp or colony it will kill it.
How to kill aiptasia with pickling lime or kalkwasser mix
1.) Mix 1 tablespoon and 1/2 teaspoon of Mrs. wages pickling lime with 1 1/2 Teaspoons of water to make a nice paste. The paste should not be running, but it also must be thin enough to get injected through the syringe.
2.)Turn your powerheads off, Apply a layer of the paste to the oral disc of the aiptasia. Sometimes you can get them to think its food by teasing their tentacles a little and then injecting the paste onto the oral disc. If they suck back into their hole right away just cover the hole with the paste.
3.) wait 45 minutes to an hour
4.) suck out the paste and the aiptasia with a turkey baster and dispose of them.
I bought 100 lbs. worth of live rock from a fellow reefer who was tearing down her tank. The rock was covered with aiptasia (estimating over 300). Some of the rocks also had some corals on them (mushrooms, green star polyps and Kenya trees)
I put the rock on a 55 gallon tank that I used as a holding area while I treated the rock before putting it into my display tank.
I mixed up a small batch of the lime paste and started injecting the aiptasia with the method used above.
I recommend doing only a few at a time as the paste can cause a PH spike in your tank if you do too much. Keep in mind Pickling lime and kalkwasser are similar products that are used for correcting alkalinity and calcium problems and can be used safely if in small doses.
Be sure to cover the whole face of the aiptasia with the paste to ensure that it cannot release its seed into the tank and make more aiptasia later. You also must get it out of the hole as even a small piece of aiptasia can grow into a whole one over time. Do it right the first time.
