Aquarium Gravel Sera Gravel Black 2–3 mm 3 l, black

Sera Gravel Black 2–3 mm is a black aquarium substrate supplied in a 3-liter package designed for freshwater aquariums. With a uniform grain size of 2–3 mm, this gravel serves both decorative and functional roles: it creates a dark, natural-looking bottom that highlights fish colors and plants while providing a stable base for rooting and substrate layering in planted tanks. The product is intended for aquarists who prefer a fine gravel that is easy to shape and maintain.

Advantages

The dark color of the gravel enhances visual contrast and brings out the coloration of fish and plants without introducing dyes that fade. The 2–3 mm grain size provides a balance between fine sand and coarse gravel, allowing good water circulation through the substrate while preventing overly compacted layers. Supplied in a pre-measured 3 l package, it is convenient for small to medium aquaria and for targeted redecoration or plant anchoring.

Suitable for

• Freshwater community aquariums
• Planted tanks requiring a fine gravel top layer or landscaping
• Nano aquaria and small tanks where a dark substrate is desired
• Fish species that prefer or tolerate fine gravel bottoms

Key specifications

• Color: black
• Grain size: 2–3 mm
• Volume: 3 litres
• Intended use: freshwater aquariums, planted tanks
• Function: decorative substrate, plant anchoring, substrate layering

How to use

Rinse the gravel briefly with dechlorinated water until the runoff is clear to remove dust from storage and transport. Spread an even layer across the aquarium bottom; for planted aquaria, consider a base layer of nutrient substrate below and use the gravel as a top layer to anchor plants and improve aesthetics. Aim for a depth of 2–4 cm for basic decoration or 4–6 cm where robust plant rooting is required. When performing water changes or maintenance, use a gravel vacuum carefully to avoid excessive removal of substrate.

Usage recommendations

Before adding livestock, monitor water parameters after placement and rinsing; avoid sudden changes in substrate depth near sensitive burrowing species. For optimal plant growth, combine with dedicated plant substrates or root tabs as needed.