Crushed Biological Gravel

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Ideal for undergravel filtration, fish systems, or as accents with fine sands where higher pH is preferred.The substrates are carefully engineered, free of impurities like ash, metals, pesticides, and silica, ensuring a safe and attractive environment for your aquatic friends. Easy system design with precise grading.

Typical Size: 3.0 – 6.0mm
Average Density: 72 pounds per cubic foot

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