Man the pharmacy here looks at me like im a idiot when I go to buy a syringe. I usually just get them from my vet as he actually understands what I am trying to do vs. the pharmacy which thinks now they have heard every excuse there is to by a needle. Sheesh! The kalk paste works great, the bigger aptasia close up around the drops of it and I suppose try to start eating it and it gets them pretty good, though lots of times there is just enough left to regenerate into a new aptasia. The little ones I like because i take the needle off the syringe, mix calk and R/O water into a super thick paste and it works like cement sealing the little bugger in its hole forever. They can regenerate new tissue but they cant break out of the dried kalk paste so they are done for.