Must be honest, I don't know. I bought it from someone called Nicholas
Cardwell, whose name I found in a plant forum. He had bought the
ingredients for himself and was happy to sell off some of the excess (he
had about 5Kg of the stuff). He was using it himself and seemed to be
happy with it.

You can take a gallon of distilled water, add 1 ml of your pmdd and
then test for P, N and K and get a good idea of what your are putting
in the tank.