Was a little pessimistic about quality due to the price being so much less but I had a drainage problem and was worried introducing this in the new pot for transplanting would cause transplant shock. Not only was there no shock across 5 transplants but the aeration is fantastic. For cannabis I suggest a 30% ratio (for soil). Great way to ensure that you get proper run off and no nutrient burn! Well done folks. Fantastic product. Buying more.