Marine sand/Coral – 1mm – 4Kg

This Marine Coral Sand is taken from a pollution-free island in the south sea of China. No phosphates, nitrates or surface contaminants, clean and is pollution-free. The main content of coral sand is calcium carbonate which is conducive to the stability of seawater pH values. Approx 1mm grain size.

It is naturally porous and well suited for undergravel filters in marine tanks.  Due to its high surface area, it simulates river bed and sea beach conditions.  Additionally, its porosity provides a home for beneficial bacteria as well.

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