Is sandtastik feldspar sand safe?

[Candace]

Ive been researching sand for my axolotls i have 2 about 4 inches and I came across sandtastik play sand its .05mm-.07mm in diameter and its made of crushed feldspar it is a very pretty white with few black flecks is feldspar a safe rock for sand in an axolotl aquarium? And with it being so fine would it be safe to add now the website and msds make it seem like it would be a good choice
Thanks in advance

 

[Wyvell]

Hello,
I was not very sure about the composition of Feldspar so I did some digging and found that it comes in 3 forms, 2 of the 3 types can leach Aluminum into water. I would avoid this kind of sand because you cannot be sure of what types of Feldspar are present and Aluminium is Toxic to Amphibians.
Sorry for the bad news, anyone correct me if I am wrong.