With COCO, all you need to do is get some megacrop and cal-mag and follow the directions and you will have nice grows.
Organic living soils are definitely the hardest way of growing in my opinion but definitely very rewarding if you get it right. I have plenty of successful experience with organic living soils with CMH/HPS as far back as 10 years ago. The intensity of the LED's is what really threw me off this go around. After reading this thread, I definitely think its do-able now, it just takes some further dialing in and probably a round or 2 to let the microbial activity really do its thing. Aside from the Build-A-Soil I have, I also use A great recipe from DANKFRANK on another site. Here is the recipe.
BASE
3.5 gal compost
1.25 gal coir
2 gal peat
.5 gal EWC
.5 gal Black Kow
.5 gal vermiculite
.5 gal permatil
1 gal perlite
~ 1.5 cu ft - 9.75 gallons of media
NPK Amendment Mix
This is added per 1.5 cu ft of media.
3/4c - alfalfa meal
1/3c - aragonite
1/2c - azomite
2/3c - bat guano(N)
1/2c - bat guano(P)
3tbsp - blood meal
1c -
bone meal
1/3c - calcitic limestone
1c + 1tbsp - crab meal
3tbsp - diatomaceous earth/calcium bentonite (red Lake Earth at Tractor Supply)
1/3c - dolomitic limestone
1/2c - dry molasses (stockade Kandy Kid)
2tbsp - elemental sulfur
3tbsp - feather meal
1c - greensand
1/2c - gypsum
1/3c + 1tbsp - humic/fulvic
1c + 1tbsp -
kelp meal
1/8c - potassium sulfate
2/3c - rock phosphate
1/3c + 1tbsp - sul-po-mg
1 2/3c - Symphony
1/2c - roots organics cal/mag
1/2c - gnatrol
Oyster shell
This creates a soil which has a NPK profile of 740-1110-945. However, due to the nature of organic materials, not all of this is available at the same time. The diversity and the balance of this mix is why it still works. I really need to find an organic source of instant Cal-Mag to tweak this recipe with for my LED's but its still solid.
Even with the same NPK profile, you couldn't get similar results by getting all of your nitrogen from something that is fairly "quick release" like blood meal. You certainly would burn your plants and have excessive runoff, leaching nitrogen, etc.
With a recipe like this, I have well over $1,000 invested in amendments alone so im not done with organics yet. I will run some soil next to my coco and get it dialed in.