Fossilized V.s Non Fossilized Seabird Guano

any used the fossilized to amend soil instead?

what difference should I see??
anything???

I don't know Jack, but growing always has a logicial reasoning. In this, if cost is reasonable, I'd do the Fosslized product because, in my mind, the older the material, the greater the chance that it's had a chance to absorb other valuable nutes, IE; Trace minerials. The rain washes iron, calciuum, all that shit. Plus the original material has had years to break down into something your Babies can readily absorb. The only way to know is to send a sample off to Texas Plant & Soil Lab., they are the only Lab. that not only tells you what is in the soil, like all the others, but what is broken down & available to your rooting system. If your soil has all the good things, but not in the form that the Plant can use, it's worthless. My shot in the dark.

I went with the fossilized for my last batch of soil and that's what my thoughts were.