It sounds like aptasia actually. There are a couple of ways. I inject kalkwasser directly into the base with a syrenge. This is hit or miss. I have seen it work and I have seen it not work. I make a cup of ro water and a tsp of kalkwasser to make a heavy duty paste/water mix and inject it directly into the base. If it is a majano, I inject and wait for it let go, and remove the anemone by hand.
By your mulitplicaiton rate, I would venture that they aren't curleyques, as well. Another way that is hit or miss and more natural is to get
peppermint shrimp. I have heard of reports of it working, and I keep a few in my tank as well, however how well it works I couldn't personally tell you. I have also see copperband butterflies shred aptisia and majano's alike, but again I bet it would be hit or miss.
Ray