Roger A. Shrubber
Well-Known Member
they buffer coco because it will bond with calcium and magnesium, taking it out of your nurtrient solution, until all the bonding sites in the coco are filled up. there are a lot of them and it takes quite a while for that to happen. your coco can "steal" at least half of the cal and mag you add to your solution all the way to the middle of flower, when the bonding sites are finally full...then all the extra calmag you've been adding to make up the deficit is suddenly available...and burns the hell out of your plant....much better to buy buffered coco, or do it yourself as you're re-hydrating it.