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Aquarium Substrates

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!

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Looking to buy Aquarium Substrates?

Here at OnBuy, we know that investing in an aquarium substrate is very important for the health and maintenance of your fish tank. It helps to prevent food, faecal matter, and other debris from freely floating around - keeping it a safe and sanitary place for your fish to live. 

Not only that, it provides your finned friends with plenty of opportunities to thrive - as sifting through fish tank gravel or aquarium sand is in line with their natural behaviour in the wild! Aquarium gravel also serves well as a planting medium so, pair yours with our plants for a unique finish.

With a huge range of colourful gravel for fish tanks in an array of hues, you'll be free to 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 is bound to leave you spoiled for choice.

Customers love our best-selling Aquarium Substrates

Popular Brands in Aquarium Substrates

Trixie
Tetra
Hagen
PETTEX
Fluval
Supa

Our most popular Aquarium Substrates

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