Natural rainbow gravel is made up of durable, multi-coloured smooth stones that mimic natural riverbeds and stream floors. It is a popular choice for freshwater aquariums because it is generally inert and pH neutral, meaning it will not alter your tank’s water chemistry.

Key benefits of using natural rainbow gravel include:

• Safe for bottom-dwellers: Sourced from crystal-clear streams, the pebbles and gravel pieces usually range between 0.5 mm and 10 mm, making it safe for fish that sift through the substrate like catfish or loaches.
• Plant-friendly: It provides a stable foundation for root systems in planted tanks.
• Biological filtration: The gravel’s natural, unpainted texture offers excellent surface area for beneficial bacteria to colonize, helping to keep the water clear and free of waste.
• Low maintenance: Natural gravel is easy to clean using standard siphon gravel vacuum cleaners without worrying about peeling or fading coloured paints.