I had one, it didn't really work. It killed the Majano, but not before it could release it's baby juice into the system. It turned out to be a never ending battle.
Now, I use kalk paste and a syringe. I injest the kalk into either the mouth, or the trunk of the majano. Trick is, get a "real" needle for the syringe and mix the kalk paste thin enough to pull it into the syringe.