Some people say hot lemon juice works. Spray them with a syringe underwater that is. Didnt for me. Among others like Pep shrimp, vinegar, son on.
But yes, even if you take it out. What are you going to dip it in by the way?
Well, its a very bad idea, you could easily end up with waay more. When you kill them, they shatter and spread spores. Which creates more.
best to invest into Aiptasia X. Can kill the Majano too. Aip X works real good, and its dead easy to use.