That is a good looking potting mix for succulents. I have bought Semps that has potting mix in it that look like yours Bev.
Now that I think of it, no one has semps and succulents for trade at the roundups. Maybe they are not that popular, but they do sell them here. I do know one person and I asked him what does he do, he said nothing and they keep multiplying, these were the little rosettes.