I wouldn't boil rocks...
I just go to a local landscaping supply yard and buy a ton of rocks. They're usually a few cents a pound. I get my sand from a local sandblasting supplier for a few cents a pound. All different grades to choose from...
I just go to a local landscaping supply yard and buy a ton of rocks. They're usually a few cents a pound. I get my sand from a local sandblasting supplier for a few cents a pound. All different grades to choose from...