Let's talk about succulent soil mix

Our soil mix has only consisted of two main components. They are pumice and sifted fine bark. We use a fine bark that's colorant-free and thoroughly aged. This simple mix allows us to adjust the ratio when it comes to varieties of succulents. For example, the regular Echeveria is more suitable with a 1:1 to 1:2 ratio (pumice: fine bark), lithops will require a 2:1 ratio.
The main idea is to keep it simple. You don't need 7 or 8 kinds of stones, or layers and layers of gritty granules. It is best to mix your soil thoroughly, not to separate them into layers.
We can't emphasize this enough. The succulent needs to establish a developed root system first, then we can feel free to stress it to its fullest color. If not well rooted, a succulent, no matter how colorful it is, isn't going to last.