Normally I use kalk to kill Aiptasia , but for some reason I can not find my kalk , I have used hot water in the past too, but I have a nice piece of coral which I don't wanna harm. So I read that lemon juice from concentrate injected into the Aiptasia will do the job, has anyone done this and do they mean inject with a metal syring ? Or use the plastic syring , reason I'm asking is Im wondering should I run to cvs and get a syring .. Thanks John