Coco Coir Block is a buffered, low EC 100% coconut coir growing medium that expands to about 2 cubic feet when hydrated. A clean, renewable by-product of the coconut industry, it is thoroughly washed and buffered to create a stable medium for hydroponics, soil mixes, and container growing. At a glance Type: Coconut coir growing medium (compressed block) Material: 100% coconut coir, buffered and low EC Expansion: Expands to approximately 2 cubic feet when hydrated Performance: Strong moisture retention with ample aeration around roots Clean: Free from weed seeds and pathogens, no added chemicals, non-toxic Certification: Organic Best for Hydroponic substrate Base for soil and potting mixes Standalone container growing A renewable replacement for peat moss Reptile bedding when used appropriately How to use Submerge the block in clean water and allow it to expand to its full volume of about 2 cubic feet. Fluff the material to break up any clumps, then use as a base for potting mixes, as a hydroponic substrate, or as a standalone medium in containers. Store in a dry place until ready to use. About The Soil Makers The Soil Makers are committed to clean, sustainable growing media that help hobbyists and professionals achieve reliable results.