red lava rock mulch
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Fish Tank Landscaping Volcanic Stone
1. Volcanic rock is formed by volcanic eruptions for hundreds of millions of years, with high hardness and not easy to pulverize. It can be washed and used repeatedly. 2. Volcanic rock has a large specific surface area and many pores, which is conducive to the reproduction of nitrifying bacteria and purifies water quality. 3. The pores of volcanic rock are dense and uniform, and the porous structure has strong adsorption capacity, which can effectively absorb harmful substances and improve water quality.
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