Safe, Inexpensive Black Sand?

[elementalkiss]

Hello, I'm looking for black sand for a 40g breeder tank. Most explicitly aquarium sand is very expensive for the amount i need (likely around 40 pounds) so does anyone know of any safe and less expensive alternatives? Thank you so much

 

[dougall]

This sort of stuff has been used by a lot of people. Just think twice about the fact that the edges can be sharp.

http://www.tractorsupply.com/tsc/product/black-diamond-medium-blasting-abrasives

 

[ProAquarist]

The only sand I use and recommend is Estes Marine Sand, which comes in black. It would only run about $40 for 40 pounds. It doesn't need to be cleaned at all before it goes in, sinks quickly if anything messes with it, is the perfect grain size, is very uniform, and doesn't allow for toxic gas pockets. It isn't the cheapest option in the world, but it is the best.