Anyone had problem's with Joe's Juice?

A guy that I am working with now said that if you use Joe's Juice it will kill the aiptasia for now, but it will just come back even stronger in a couple weeks. Has anyone ever heard this before? It worked perfectly for me (I had to jam the applicator into the hole the mojano pulled back into and squirt it in there, but it killed it) and all I have ever heard about this stuff is that it is great. Are there any cases to support his claim or is he just misunderstanding what happened in his tank? (He used it and said they came back, but maybe OTHER ones came in? He said he used it as directed by feeding them as well as by jamming it into them like I did) He told the customer to just use vinegar at full strength and not to worry about the Joe's Juice.

"It does work like that. Not really though."
What?

I only had two or three come up on mine, and that was later. They were not on the rock initially (not showing anyways). I am talking about in general. The guy at the LFS I am working at said it does not work and I am the only person in the industry it worked for because they just come back stronger. Mine were mojano and the ones he was battling were aiptasia.