Opinions on 3M colourquartz gravel
So I was looking for a cheap plant substrate, when I came across 3M colorquartz on a lot of reef/marine/cichlid forums. Apparently it's quite cheap, about $20 for 50 pounds, it's 3mm in grain size, is inert, and comes in black colour.
After some thread searching on those forums, I found a distributor in Toronto that sells 3M colorquartz gravel. I e-mailed the distributor, and they reply saying they do carry it. Still waiting for reply on the pricing right now.
What do you think of 3M colorquartz? I'm thinking of getting 50 pounds of the T-grade or S-grade Black Colorquartz.