Jerry,

Just took a quick look at this on their website. Interesting, recycled glass.

I like the fact that a company is recycling waste materials and turning them into something useful. Of course it probably takes a lot of energy to turn glass into Growstone, but that's another discussion entirely.

I would be tempted to try a bag as an experiment, however the cost of $20 or more for a very small bag would make the cost prohibitive compared to products like NAPA Floor Dry or Turface.

Still it's a nice idea that waste materials can be made into something useful like this.

Thanks for sharing.

TYG

One of my local hydroponics stores has the smaller sized Soil Aerator 1cu bag for $15.35, I didn't think that was so bad for less waste.