By "soil bennies" he means, the beneficial microorganisms that live within the soil. With true organics, you're not feeding the plant, you're feeding the soil. You may need to re-think a lot of what you've been taught about growing pot, or look at it from a different perspective. Instead of dealing with bottled nutes, NPK ratios, and brands like "Miracle Gro" (stay clear away from any products like these) - BUILD your own soil from scratch. It's fun, fairly easy, and works insanely well. Spend a couple hours reading through the following threads/links. I know it may take some time to read, but it's worth it!!!
ROLS (recycled organic living soil) -
https://www.rollitup.org/t/recycled-organic-living-soil-rols-and-no-till-thread.636057/
BuildASoil (an excellent overview of the concept) -
http://buildasoil.com/pages/the-complete-system
Once you have a better understand that you need to create a customized/perfected (amended) soil like this, all you'll
need to do is add plain water. Yes, you can add other things like AACT's, SST's, etc.... but you'll still get fantastic results with a soil mix that you make from scratch with only plain water! It's amazing - I'm about a month into veg with my first ROLS, and haven't ever seen such healthy plants!
There are a lot of helpful growers here that have created a lot of "stickys" in the organic section of rollitup - take some time to read or skim through them!