Kick ick is just 1 of millions of snake oil cures. The results are mixed because there is no solid evidence that it works. Most of the people that says it works was because the ich parasites finished their cycle on the fish and voluntarily fell off. It was just good timing that the cycle was ending at the same time. Most of what you find is that at it's best these "new, reef safe" products do nothing. Unfortunately, this includes the UV, it will kill some, but not cure any problem. The only proven method for fighting the problem is copper, or hypo salanity, both can only be done in a separate tank. and must be done for a minimum of 4-6 weeks (depending on treatment). There are a lot of threads out there that will go into great detail how, and what to look for.