At least a couple years in a 200g full of rock. On rare occasion I may see one pop up on a new frag (especially Zoa) and nuke it. FTR I have never used predators to get rid of them.How long "free"? I'm curious.
Believe someone said Aiptasia X is garbage. It works very well IMO but you have to get it into the mouth so the tentacles close around it. Probably does seem garbage if not following directions and just squirting it on. There's a reason for the syringe along with straight and angled tips.

