650g Compressed Coco Coir Substrate Block Ideal for mushroom cultivation, horticulture, and soil conditioning, this 650g block of dry coco substrate is made from premium-grade, sustainably sourced coconut husk fibers. When hydrated, it expands to yield approximately 8–10 liters of fluffy, well-aerated coco coir—perfect for maintaining optimal moisture and promoting strong root or mycelial development. Size (dry): 650g block Expansion: Yields ~8–10L when fully hydrated pH balanced and low EC for reliable performance 100% natural, biodegradable, and reusable Excellent water retention and aeration balance Suitable for mushroom cultivation, seed starting, houseplants, and hydroponics Additives such as Gypsum can be purchased here Easy to store, lightweight, and clean to handle, this coco coir substrate is a versatile and eco-friendly growing medium for both home and professional use.