This CANNA COCO brick is the exact same high quality as the much desired loose fill CANNA COCO. This means it is made from the highest quality ingredients. It is washed and buffered, not steam sterilized and RHP certified for horticulture. The buffering process allows CANNA to “pre-program” the medium to a certain age. This ensures the same consistent, high quality medium time after time. The composition of coco components blended together offers the best water-air ratio.