These coir briquettes by Hydro Organics / Earth Juice are comprised of a superior commercial-grade coir pith fiber that doesn't contain the high levels of salt found in inferior coir products. Earth Juice's briquettes exhibit an exceptionally good balance of wetting and aeration, as well as a strong resistance to bacteria and fungal growth. Use grow coir briquettes as a planting mix or as a soil additive and conditioner.