Superior for hydroponics: less water usage, pH neutral, great aeration and much more! Pure and Organic. Hydrorock is created by heating clay at temperatures that exceed 2000 degrees F. Hydrorock has many features and benefits with versatile applications: Reduces water usage; it retains 35% of its weight in water! pH neutral; it will not affect the soil balance. Won't clog up hydroponic systems because Hydrorock will not decompose! Pebble design ensures superior aeration. Prevents soil compaction. Reusable after washing so delivers great long-term value! Promotes healthy root structure. With its decorative color, it blends well with other soils. Also makes a great mulch or ground aggregate in high traffic areas. Shipping weight of 57 lbs.
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