Aquarium Gravel Sera beige 2–4 mm, 6 L – decorative substrate for freshwater tanks

Sera Aquarium Gravel beige 2–4 mm, 6 L is a decorative substrate designed for freshwater aquaria. The beige granules, sized between 2 and 4 mm, form a natural-looking bottom cover suitable for planted tanks, ornamental aquariums and biotope-style setups. The gravel provides a stable base for plants and hardscape elements while increasing surface area for colonization by beneficial bacteria that support biological filtration.

Advantages

The uniform 2–4 mm grain size creates a stable and even substrate layer that prevents excessive compaction while allowing water flow through the bed. Its natural beige color complements a wide range of aquatic planting styles and fish coloration without affecting water chemistry when rinsed before use. The coarse texture supports root anchoring for many common aquatic plants and promotes growth of nitrifying bacteria, contributing to a healthier aquarium environment.

Suitable for

• Planted freshwater aquaria
• Ornamental community tanks
• Shrimp and small invertebrate setups
• Natural-style and biotope aquascapes

Key specifications

• Granule size: 2–4 mm
• Volume: 6 litres
• Color: beige
• Material type: aquarium gravel suitable for freshwater use

How to use

Rinse the gravel thoroughly with clean water until the runoff runs clear to remove dust and fines. Spread an even layer on the aquarium bottom; typical depth is 3–5 cm for decorative setups and 5–7 cm where plant root development is intended. Position plants, stones and decorations on top of the gravel. Start filtration and cycle the aquarium to promote establishment of beneficial bacteria before introducing sensitive livestock.

Usage recommendations

For planted tanks, combine this gravel with a nutrient-rich root substrate or place root tabs to ensure long-term plant nutrition. Regular vacuuming during water changes will remove accumulated detritus from the surface while preserving beneficial bacterial colonies deeper in the bed.