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I'm really interested in this too. I've been using the coco slabs for a couple years on and off but was just reading on the canna website how the cogr slabs are their newest best version of coco mix for better aeration and nutrient absorption while still acting as a hydroponic medium. You need to use their buffer agent for 24 hours and then their cogr vega/flores with the whole line. I'm really interested in this and if anyone out there has experience with these slabs please share. If I try it out on a light I will be sure to make a thread and post on here within next month or two