Bake your coco. Rinse it for a long time watching runoff ppms, get them under 1 ec, put it in turkey bags, and bake it. You need to kill off pathogens and insects and their eggs and their nasty stds from sri lankan hooker root aphids.
Coco is great. It makes roots behave differently because of some enzyme or something. It contributes a ton of K and S as it slowly decays, so the S gives more flavor and K leads to more frost and bud size. Coco needs to be fed a certain amount of Ca and Mg before it is "full" and can stop locking up Ca and Mg.
Coco run by itself should never be flushed w/water, that will strip away the salt balance we try to maintain with it. It must always be fed some strength of food so as to not screw up the Ca and Mg thing.
But I do not know how that would work out in soil. I don't know a lot about soil. I do know that Subcool uses it now in his supersoil recipe that some peeps are fond of.
Everybody who plays with coco ends up moving towards it more and more.
I do believe that amending your soil with coco will aerate it more, and enhance your growth rate.
I have only used Canna, B'cuzz and some random new block of compressed stuff from the grow store, so I cannot say about HD's coco.