CANNA would only consider introducing a brick if it would really be different than any other brick available. After several years of development and testing, CANNA has succeeded in producing a coco brick that is the exact same high quality medium that CANNA is known for but in a compressed form and one that truly makes a difference. A hole difference! Its most distinctive feature is the hole. It creates extra surface which makes it easier to absorb water. Therefore the CANNA COCO Brick expands extremely fast. This brick makes life easier in many ways: it is easy to use and it saves the grower time, money and effort. If you want to know the 'hole' difference.