The organic topsoil/sand-soil mix is mentioned here as the appropriate choice for experienced keepers running a bioactive system. For the specific mix ratios, moisture management, and plant root compatibility, see Bearded Dragon Bioactive Setup Guide.
This is the mix I rely on for my adult bearded dragons-its durable and encourages natural behavior. Beginner-Friendly Low-Dust Option: Use 70% topsoil and 30% sand for a firmer texture.
Instead of using play sand for your bearded dragons enclosure, opt for other substrates, such as calcium-based sands or terrarium carpeting, that are specifically designed for reptiles like bearded dragons.

Sand, tile, or carpet? We rank the best bearded dragon substrates based on safety, cleaning ease, and impaction risk. See the definitive guide.

How much zeolite sand do I need?How do you use ZeoSand? Determine the amount of media required for your sand filter based on the ZeoSand replacement ratio. Fill filter half-way with water. Slowly pour ZeoSand into filter allowing all media granules to be thoroughly wetted.