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- Made from expanded volcanic glass β lightweight, sterile, and pH neutral
- Excellent drainage and aeration properties; does not compact over time
- Common uses: mixed with coco coir (70:30 coco/perlite), soil amendment, standalone drip medium
- Holds approximately 20% water by volume while allowing oxygen access to roots
- Reusable after sterilisation between grows
- Fine perlite can be used in NFT channels; coarse perlite suits deep drip and Dutch bucket systems