What type of gravel is in this video?

[rtro92]

Check out this video...

http://www.youtube.com/watch?v=LHGzo8hQl5Q

What type of sand/gravel do you think is used here? It looks like really course sand, or very, very small gravel.
I'm beginning to set up a new 55 gallon, I'm thinking of getting the bedding like this.

Does anybody have any links to a comparable product??????

THANKS!

[Betta man]

If you read towards the bottom, it says sand substrate.

[lohachata]

we went through that already..it says "sand substrate" but not what kind of sand...not to mention that it appears to be kind of on the big side for regular sand...