Try again with the Aiptasia X! I used it for my tank and knocked them DEAD in minutes. You got to make sure that you get them all. Don't hasitate to use a generous amount for each little problem. I was worried about my fish eating the stuff, because when I did it they were eating the left over amount. I read online and from the most I can gather it's just like Alcohol to them, it won't kill them just make them loopy. I don't know if that's true, but the important thing is it won't kill them.
So apply generously, and you got to turn your filters off and skimmer off for at least a few hours.
Fish Sticks, the best thing you can do with your dead fish.