So, I had 4x 1/2 CF bags in my cart and it seemed like it was a decent deal, but I was curious about the difference if I paid for shipping on 2x 1 CF bags.
I noticed shipping on the 1 CF bag is only about $16 to Central Illinois. So, if I grab the 2 bigger bags I save over $30. Make sure to check for yourself. I imagine if you live closer to Colorado you'll save even more.
And, by the way, this is some top tier pumice. I've already got 2 more bags in my cart for my outdoor veggie garden.