Viridian Reptile Nutrition Cal-Clay is a premium calcium-bearing clay substrate specifically designed to promote the cultivation of springtails, ensuring an abundant and nutritious food source for reptiles and amphibians. Made from 100% natural materials, including fine clay powder, calcium carbonate, and coconut husk fiber, Cal-Clay provides an optimal environment that encourages springtail reproduction. Its easy-to-mix formula creates a stable, nutrient-rich substrate ideal for bioactive setups and naturalistic habitats. Perfect for dart frogs, small reptiles, and amphibians, Cal-Clay is your go-to solution for maintaining a healthy and balanced ecosystem in your terrarium.