Aquarium gravel sera Gravel Brown 2–3 mm 6000 ml by sera

Sera Gravel Brown 2–3 mm is a natural-colored aquarium substrate supplied in a 6000 ml container and intended for freshwater tanks. The medium-grain gravel creates a stable base layer for plants, hardscape and decorations while allowing water flow through the substrate to support biological filtration. Its brown tone blends with natural aquascapes and helps conceal roots and equipment. The grain size of 2–3 mm ensures good anchoring for plant roots and provides interstitial space for beneficial bacteria.

Advantages

The gravel delivers an even, durable substrate layer that resists compaction while permitting oxygenated water movement. Neutral in composition and color, it integrates with planted and community aquariums without altering water chemistry. The 2–3 mm grain supports root penetration for most common aquarium plants and creates a habitat for nitrifying bacteria crucial to the nitrogen cycle.

Suitable for

• Freshwater planted aquariums
• Community tropical tanks
• Aquascapes with natural, earthy aesthetics
• Substrate for rooting plants and stable décor placement
• Biological filtration support in undergravel or layered systems

Key specifications

• Grain size: 2–3 mm
• Volume: 6000 ml
• Color: brown (natural tone)
• Intended use: freshwater aquariums
• Mechanical properties: medium-grain, low compaction

How to use

Rinse the gravel briefly with clean tap water to remove dust before adding to the aquarium. Spread an even layer on the tank bottom; recommended depth depends on plants and design but typically ranges from 2 to 5 cm for general setups and up to 8 cm for heavily planted aquaria requiring deeper rooting. Arrange hardscape and plants on top of the substrate, taking care to position root-feeding plants with their roots buried. Start filtration and cycle the aquarium according to standard freshwater procedures.

Usage recommendations

For best results combine sera Gravel Brown with a nutrient-rich substrate layer beneath if growing demanding aquatic plants. Avoid using acidic water treatments that could alter the neutral characteristics of the gravel. Regular vacuuming of the surface layer during maintenance preserves water quality while leaving settled bacteria in deeper layers intact.