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The ROCKS are an expanded clay and shale rock medium, mined exclusively for SEA OF GREEN SYSTEMS in the United States. Featuring an excellent Cation Exchange Capacity (CEC), SOGS ROCKS are fired for 2 hours at 2,000 degrees Fahrenheit in specialized rotary kilns to ensure the product will not carry pathogens, spores or disease. With increased porous structure and surface area, the ROCKS maintain steady hydraulic flow and excellent nutrient retention in the root zone. For use as a hydroponic planting medium or as an amendment to those growing in soil, the ROCKS provide plant root systems with a more natural environment than competing products.
DR. SOGS Rocks $ 16.95
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