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DARK BROWN QUARTZ – Crystalline Quartz Gravel for Freshwater Aquariums, Safe and Neutral
Dennerle Dark Brown Quartz 5kg is a high-quality natural crystalline quartz gravel, trusted for decades for its biological performance, aesthetic appeal, and safety for aquatic life. It is an ideal substrate for freshwater aquariums that require chemical stability, biological efficiency, and a natural appearance.
With a fine grain size of 1–2 mm and rounded edges, this gravel is safe for bottom-dwelling fish and well-suited for plants with delicate roots. The quartz is chemically neutral and does not alter water parameters, being free of harmful substances and colored with iron oxides. The tiny gaps between grains provide the perfect surface for beneficial nitrifying bacteria, enhancing biological filtration and ecosystem health.
This gravel is CO₂ and light resistant, retains its natural dark brown color, and is reusable over time. It requires no pre-rinsing, except for the natural white version, making it easy to use and long-lasting.
Main Features of Dennerle Dark Brown Quartz:
Natural crystalline quartz gravel for freshwater tanks
Elegant and natural dark brown appearance
Fine 1–2 mm grain size, ideal for bottom fish and plant roots
Rounded edges for safe use with sensitive species
Chemically neutral, free of harmful substances
Does not affect water hardness or chemistry
CO₂ and light resistant, long-lasting color stability
Encourages beneficial bacteria colonization
Ready to use, reusable, no rinsing required
Why choose Dennerle Dark Brown Quartz?
Perfect for aquarists seeking a safe, natural, and biologically effective substrate, this gravel supports long-term stability, enhances aesthetics, and ensures a healthy environment for both plants and aquatic animals.
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