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Gravel, Pebble & Sand Substrates

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Aquarium substrates aren’t just a great way to make your tank look wonderful; they provide a sturdy base to pop your underwater plants into, and help maintain the overall health of your fish tank. Find gravel, pebbles, sand and more among our sea-riously stylish collection. Dive in! Read More >

About Gravel, Pebble & Sand Substrates

Investing in an aquarium substrate is very important to the health and maintenance of your fish tank. It helps to prevent food, faecal matter, and other debris from freely floating around in the tank. What’s more, many species of fish thrive when they have gravel or sand to sift through, as this is in line with their natural behaviour.

Aquarium gravel also naturally serves well as a planting medium; pair your choice of fish tank sand, fish tank pebbles and stones with a handful of distinctive plants for a unique finish. Have you checked out OnBuy's collection of fish tank plants?

Showcasing a huge range of coloured fish tank gravel in an array of hues and patterns, OnBuy’s range will help you build the perfect aquarium from the ground up. From slate effects to fluorescent colours that’ll pop when coordinated with the right lighting, our selection of aquarium stones is bound to leave you spoilt for choice.

Remember to clean or replace your fish tank gravel or sand regularly to ensure your fish have a safe and sanitary space to live in.

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