I add two 2.2 gallons of water to a block, pouring it slowly to promote even absorption. Let sit for 10 minutes then grind with a drill and paint mixer blade. I use a window-washer bucket, which is wide enough to accommodate the brick. The resukting coco feels good in the hand and is very effective as a neutral substrate. I have grown HUGE tomato plants, cucumbers, peas, and lettuce using this stuff in my Autopot system. Very good value.