Bloom nutrients for soil

yeah, we make our own add water only soil, germ to harvest with autos, I keep two tubs, one for new soil, one for aged soil and use up the aged first. I don't reuse soil, just don't have the room, but I have some kickass old pot soil out back in the compost bin. I cheat, I add commercial granulated fertilizer (supposedly organic) to the mix and let it cook a while. My soil is pretty hot for seedlings, but fine for mature plants. I don't really think adding anything would improve anything. I've done plenty of side by sides with liquid low nitrogen bloom water.
 
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