It took mine awhile to come out, I think it was because I had Heniochus Butterfly. But they died from stress and ich. The new lights I got was heating up the tank to 84 during the day which I wasn't home to check, it lowers to 78 at night and that's when I get home when the MH's are off. I didn't know until one day when I came home early to check why they were like that. They were too far gone to save, but after they died, ALL the creatures showed up, at least I was able to save the other fishes in my tank and gone into Reef now, couldn't have the butterflies with the reef so it was a good thing that they died and cause they had sooo much ich on them, it would of made a million of those ich babies causing my other fish to get'em, but also a bad thing, didn't really want them to die, prefer trading them in for something else, they were very nice fish. We're thinking about getting another tank to put Heniochus Butterfly again, we really like those fish. :happyfish