I've been thinking about getting an axolotl for a while. I prefer to research as much as I can before I try anything, it's better if I have at least an idea of what to do. I've got experience in freshwater. My main question is substrate. I've read that bare bottom tanks are good for axolotls, and that they have a habit of uprooting plants. Would black diamond blasting sand be safe for them? Or should I just leave the tank bare bottom and paint the underside of it black?