MOAB is a product by Mad Farmer. It is a flower booster, heavy in P, K and B vitamins. It is for the first two weeks of flower, and the last two weeks, effectively replacing Open Sesame and Cha-Ching, but Beastie Bloomz goes on as usual. It is not very expensive at all, especially compared to all these products promising the moon and the stars, and then charging you 35 bucks for a 4oz bottle of it, and then you still don't see a difference between that and what you usually use. The MOAB is very strong and concentrated granular fertilizer, so it demands respect, but it mother fucking works. I have only used it once, on my first attempt at growing (I had 0 advise, and books aren't very helpful without any experience), so it didn't turn out so well, massive cola's, though.
But believe me when I say it works like crazy! The hydro store owner around here uses it with Beastie Bloomz, and his buds are KILLER, he pulls weights that baffle me. He loves MOAB so much he dedicated a tattoo to Mad Farmer, and his entire left leg is one giant MOAB ad. It's pretty sweet.
I just found my original bottle of MOAB during the move, and the farmers I just moved in with have the fox farm trio boosters, so I'm going to use those on my 400w (upgrading to 600w) test garden, and in the main grow show I will continue on with my H&G in it's entirety.