Learn more about STG by watching their instructional videos at http://www.suretogrow.com/video/

STG Loose Fill can be used to fill - Bato Buckets, Dutch Pots, Grow Bags, Net Pots, Stacking Vertical System Growing Tubes and Nursery Pots.

Designed as a superior alternative to loose media and granulated products, including
Granulated rockwool
Coir, perlite, vermiculite 
Expanded clay, clay balls, grow rocks The STG Advantage

Lightweight - lighter than granulated rockwool (rockwool granulate weighs 3#/sq ft - use this for your calculation) Sterile, clean and hygienic
Optimal aeration and water retention
Quicker germination and better yields
PH neutral
No conditioning or pre-soaking
No salt build-up
Significantly lower freight costs
Requires a fraction of storage space