Meh, not sure why you're so hung up on it. Yes it is mostly usable, but again a large portion of it isn't. I can't say that about pbp.Its bottled weed specific plant food. 6 years ago it was quite the fad in coco at the grow stores.
its mostly plant usable. Can be poured right in the medium.
pbp was good stuff, I'm just trying something different. Combined with the dry 4-4-4 id wager that about half my feed is coming from insoluble sources
And EJ is almost a 30 year old fert line. I certainly wouldn't call it a fad. It worked extremely well for me before.
Keep in mind the EJ is just supplementing the feed program in my grow anyway, the 4-4-4 is providing base nutrition.
the gaia green 4-4-4 is alo organic and its good stuff, its made from alfalfa meal, bone meal, blood meal, glacial rock dust, potassium sulphate, fossilised carbon complex, rock phosphate, greensand, kelp meal, and gypsum. Its pretty much what goes in a coots or tom hill mix, but its ready to use. Still needs healthy soil biology to make it work.