Compost Sure Blue has been specially formulated for use as bulking material in all Sun-Mar low Water Flush Centrex systems. Compost Sure Blue facilitates composting by physically mixing the waste to present more surface area for breakdown. It holds moisture to help maintain the moisture content in the compost. It also ensures good porosity so that liquid can drain easily, leaving behind free airspace for oxygen. Finally, Compost Sure Blue offers a biologically active matrix. Supplied in a 30-litre bag.