By - BusyRaise7963
For my bioactive ksb enclosure I use jungle mix coco fiber because it can slightly humid enough for the the springtails/ isopods and similar enough to sand.
Hope this helps
That's because what you're looking for is top soil not potting soil. Just get the $3.00 bag of top soil at the hardware store. You can add worm castings or other natural fertilizers for the plants, but the base should be top soil.