Question: Healthy sand for my axolotl

[winter]

I got my axolotl yesterday and bought a 30 gallon tank with plants, hiding places and
Black quartz sand. I'm a bit worried because I've read in some sites that sand is
Dangerous for axolotl's. I can't throw the sand because of the plants i was just wondering if it'll cause any problem

 

[Cloppy]

Sand is sometimes a hazard for young axolotls, but if your axolotl is over 5 inches in length, sand should not be an issue.