No, aquarium sand should not be used for reptiles. Reptiles require a substrate that is safe and appropriate for their needs. Aquarium sand can contain chemicals or minerals that can harm your reptile if ingested. Additionally, it does not provide the necessary support to your reptile’s feet, meaning they could suffer from foot health issues. There are many other substrates available which are designed specifically with reptiles in mind and these should be used instead of aquarium sand; some good options include aspen bedding and cypress mulch as both offer a natural look while providing cushioning and traction for a healthy environment for reptiles to live in.