Aquarium substrate Tetra CompleteSubstrate 5 kg — natural gravel for freshwater tanks

Tetra CompleteSubstrate 5 kg is a natural gravel substrate formulated for freshwater aquariums. Supplied in a 5 kg bag, this substrate creates a stable base for decorations and plant root systems while providing a textured surface that supports colonization by beneficial bacteria. Its natural appearance integrates with a variety of aquarium styles and helps maintain a balanced environment for common freshwater fish and plants.

Advantages

The substrate offers a consistent particle size and natural coloration that stabilizes décor and plant roots without releasing pigments or additives into the water. Its granular structure increases surface area for biological filtration and supports the establishment of nitrifying bacteria. Being ready to use out of the bag, it reduces preparation time for tank setup and is compatible with common freshwater aquarium maintenance routines.

Suitable for

• Community freshwater aquariums with small to medium-sized fish
• Planted tanks where a natural base layer is required for root development
• Biotope-style setups that benefit from natural-colored gravel
• Temporary or permanent substrates in starter and hobbyist tanks

Key specifications

• Weight: 5 kg bag
• Material: natural gravel
• Intended use: freshwater aquariums
• Particle characteristics: granular texture suitable for plant roots and bacterial colonization
• Appearance: natural stone coloration for neutral aquarium aesthetics

How to use

Rinse the substrate briefly with dechlorinated water to remove any dust before adding it to the aquarium. Spread an even layer across the tank floor; recommended depth depends on planting needs but commonly ranges from 2–5 cm for simple setups and can be deeper for heavily planted tanks. Arrange décor and plants on top of the substrate and perform a partial water fill to avoid disturbing the layer. Start biological cycling using standard procedures and introduce livestock only after stable water parameters and established beneficial bacteria are achieved.

Usage recommendations

For planted aquariums, combine CompleteSubstrate with root tabs or a nutrient-rich layer below if intensive plant nutrition is required. Avoid aggressive substrate stirring during maintenance; perform gentle vacuuming of top debris and periodic partial water changes to preserve the substrate structure and support aquarium stability.