I know what you mean, but for some reason in my new tank (Nov 09) every single I put in there grows like mad. I bought a frag with 3 polyps, it has been 3 weeks and I swear there are 11 new growths, 6 now with heads and the rest forming. I bought some nuclear halo's that were half covering the plug and now the plug is covered over and growing on the rocks, every couple of days there has been new growth. My Alien Explosion zoa's that started with 2 heads now has 5, which I enjoy. I have had many tanks all setup about the same way, yet this one grows everything, I could only wish my 180 grew things like this one.