Aquarium and terrarium decorative crushed polished stones NB Minerals blue ocean 8–12 mm 5 kg

Aquarium and terrarium decorative crushed polished stones NB Minerals blue ocean 8–12 mm 5 kg are natural-looking polished gravel designed for use in aquaria, terraria and vivarium landscapes. The product offers smooth, rounded grains in a Blue Ocean color range with a consistent grain size of 8–12 mm, supplied in a 5 kg bag. Stones are non-toxic and feature a polished surface that reduces fine debris accumulation and helps maintain clearer water and cleaner substrate surfaces in both aquatic and terrestrial enclosures.

Advantages

The polished finish provides a smooth surface that is gentle on aquatic fauna and reduces trapping of detritus compared to rough gravel. Uniform grain size of 8–12 mm makes the substrate easy to layer and clean, while the Blue Ocean color gives a natural and stable appearance that enhances plant and animal contrast. Being non-toxic and stable in water chemistry, these stones are suitable for long-term use in both freshwater aquariums and terrarium setups.

Suitable for

• Freshwater aquarium substrate and decoration
• Terrarium and vivarium floor covering and landscape accents
• Planted tanks when used with proper planting technique and root support
• Decorative pathways and focal points in reptile and amphibian enclosures

Key specifications

• Grain size: 8–12 mm
• Color: Blue Ocean (polished finish)
• Finish: Polished, smooth surface
• Packaging: 5 kg bag
• Material: Natural crushed stone, polished
• Chemical stability: Non-reactive and non-toxic when used in typical freshwater and terrestrial conditions

How to use

Rinse the stones thoroughly under running water before adding them to an aquarium or terrarium to remove any packing dust. For aquaria, spread an even layer of gravel to the required depth, taking into account plant root systems and filtration flow; typical depth for decoration and substrate support is 2–4 cm or deeper for planted tanks with additional substrate layers. For terraria and vivaria, distribute stones to create desired landscape contours and secure plantings or hides. Monitor water parameters after initial placement and after a few water changes to ensure stability.

Usage recommendations

Avoid using these stones in setups requiring very fine substrate for burrowing species; pair with appropriate soil or sand layers for species that need finer grain. Regular mechanical filtration and periodic vacuuming of the surface will help maintain clarity and hygiene. If used in planted aquaria, consider adding a nutrient layer beneath the stones for optimal plant growth.