First garden..

I am thinking of using Happy Frog Soil, mixed with some clay balls, with a mulch layer of clay balls as well. I don't want to use anything that appears white in the soil, as I'd like to use the old soil in my flower gardens outdoors. The white specks look horrible. I'm thinking that I could sift out the clay balls and reuse them?

Also, where the heck do I find Spin-Out / Microkote in paint form?!

Any input is welcome!​