10LB Compressed Coconut Fiber Substrate, 100% Organic Coco Coir Fiber Brick H… on July 15, 2026 July 15, 2026 Step 1: Place the compressed coco coir brick in a container. 【100% Natural Coco Coir Fiber】: Reptile substrate is made from 100% natural coconut fiber, breathable, biodegradable, Low EC & PH balanced.