How much does each brick expand?
Coco coir is a natural product and therefore wont expand the exact same amount each time, but we can provide some pridictable ranges. The 10 lb blocks should expand to 2.2 - 2.5 cubic feet. The 650 gram bricks should expand to .25 - .32 cubic feet. The 250 gram bricks should expand to .08 - .12 cubit feet.