How important is cannazym in my coco grow?

Never heard of it before, but just looked it up and read about it.. seems interesting expecially if your wanting to try to re-use your medium. I don't see any reason why you can't use it! Should be beneficial all around with no side effects.. Here's their use instructions Nutrient and enzyme preparation for aiding in the breaking down of cellulose. CANNAZYM helps breakdown dead root material. Shake the bottle well before use Dosage: 0.3 fl oz/gal (25 ml/10L) Minimal once a week, preferable continuously Older (untreated) slabs; double the dose for 1 month When reusing the medium; double the dose for 1-2 weeks Do not prepare the solution for more than ten days in advance Do not use together with products containing hydrogen peroxide