We use recycled coconut fiber, called coir, a food industry byproduct. As such it’s sustainable, less acidic, and performs better for the myriad of uses we need:
1. Cover Material for Composting Toilet
2. Worm Composting Bedding
3. Mulch and soil additives
4. Upholstery Stuffing
There’s a great tutorial for using Coconut Coir at The Real Garden.
We get ours at Amazon with free shipping, and are very happy with the results. It comes in 11 lb. compressed bales (expands when hydrated) for $22.