Perlite is a heat expanded silicous rock product for use as a hydroponic growing medium. Perlite retains enough moisture for it to be effective as a hand watered medium, but also has sufficient drainage to be used in a recycling drip irrigation system. Perlite is extremely lightweight and is suitable for use in a variety of growing containers, including pots, trays, bottom fed auto watering systems, etc. Coarse perlite has the highest air porosity, so it offers the most drainage capability and ensures the roots of your plants can breathe well. It’s popular among people who grow orchids and succulents, and also people who do a lot of container gardening, as it provides excellent drainage. 100% Australian owned company. Features and Uses: Hydroponics Potting mixes Insulation Lightweight concrete Texture coating Australian Organic Registered Garden Product Australian Organic Registered Farm Input Packaging: 5L Bag is packed in 1x5L Resealable Zip Lock Bag (Net Weight approximately 400g) 10L Bag is packed in 1x10L Resealable Zip Lock Bag (Net Weight approximately 800g) 20L Bag is packed in 2x10L Resealable Zip Lock Bags (Net Weight approximately 1.6Kgs) 50L Bag is packed in a 5x10L Resealable Zip Lock Bags (Net Weight approximately 4Kgs) 100L is packed in a bulk 100L Sack (Net Weight approximately 8Kgs)