Fastslappy where do you source the pumice and hardwood charcoal you use with your coco and how dose it affect the coco's PH? I found this spot a little while back has some well priced hard to find addictives for the more open minded gardner...
http://buildasoil.com/collections/supplements
http://www.bestchitosan.com/e_productshow/?22-Chitosan-Oligosaccharide-Powder-22.html
pumice was a bitch to get & then it's expensive as hell
But I* found a product that is made 100% outta the stuff is & is wildly avalable
@ feed stores , anywhere they keep horse & live stock using this stuff
it's called
"Dry Stall " comes in 40 lbs bags fer $9.oo at my feed store iirc last time i got
100% pumice no additives
it's a fine version which actually the best for coco
the charcaol I crush hardwood charcoal i get from Whole foods
throw a old rug over the bag & whack the fuck outta it with a hammer ,maul ,
big chunks are fine as the idea is a host for grems all fines & dust are good too
both these thing will balance/buffer the coco
i use 15 % of each per volumes of coco
i add diaomatios earth , osstyer shell flour , rock flour
dicomposed seaweed ( the left-overs of a seaweed extrac )
I use this both indoors & greenhouse
'll send a box of drystall pm me