These bricks made from coconut coir fibre.

Each brick can expand to approximately 10L of loose coco coir once water has been added.

Simply place the coco brick into a container of suitable size and slowly add water until you have achieved your desired consistency. As the compressed brick absorbs more water, it will slowly expand making it easy to break apart.

You will receive 10 bricks, which once expanded will produce 100 litres of substrate.