Hello! So I'm thinking about converting a old aquarium into a tank for a lizard of some sort. I really want to have some kinda connection or "friendship" with the lizard so a bearded dragon seems ideal (let me know if you have other suggestions, keep In mind I'm a beginner and only have extensive experience with fish). But my question is, can I use the sand in my tank currently for the dragon. I'm guessing no. But want to make sure since it would save me some money. It's Rocky sand and isn't very fine, but not gravel. I don't know the brand off the top of my head so if you know of ingredients or specific brands of aquatic sand that would harm the dragon let me know.