I don't know how the magic works, just that I'm pleased with it so far. Buying liquid nutrients is something I cannot justify as I already pay enough for tap water. There are so many variables to tinker with and spend a fortune on, that if I can find all the esoteric additives in one easy package, I'm going for the easy route. I do add cal-nit for things like beets and others that scream for nitrogen and I will always add rock dusts and compost and/or other biologicals. Post Oct. 17, I may add MPK during flowering...or not, as reports seem to show just megacrop being great for the whole run. I think that perfecting the lighting spectrum would be a more fun thing to spend a fortune on than salt water.