FWIW Mammoth P is really popular with the growers here in Colorado and I can say both first hand and second hand it works. As for the funky phosphorous supplying bacteria, you have to research the specific bacteria strains that Mammoth P uses. One of them is the only living organism that is patented, which I assume is why Mammoth P is so expensive. They're very unique strains, not the stuff that's' in most of the other beneficials on the shelf at your local hydro store.