Vivarium Naturals Bio-Thrive formula is carefully crafted with the utmost dedication to quality and purity. What sets this product apart is its remarkable feature of being 100% Free of Coco Coir & Top Soil. We understand the importance of providing a safe and optimal environment for your pets. This ensures that your millipedes and isopods can enjoy their habitat without the risk of potential coco coir-related issues, and helps to ensure a clean and hassle-free experience.