The actino iron is measured by the total weight... meaning, 1.37% of 9oz versus .0371% of 20 gr.At my local store, they sell Actinovate, and another similar product called Actino Iron. The Actino Iron seems to have a LOT more of the same active ingredient. Actinovate contains .0371% and Actino Iron contains 1.3% and the label says it also contains iron and humates.
Almost fooled myself on that also... thought it was a much better deal, but in reality it is not.