Collection: Aquarium Substrate – Gravel, Sand & Plant Substrate for Fish Tanks

Shop aquarium gravel, freshwater sand, planted-tank soils, and shrimp substrates at Tropical Treasures Wyo in Cheyenne, Wyoming. Choose from decorative gravels, soft sands for bottom dwellers, and active aquasoils for planted and specialty shrimp tanks.

Consider your livestock, desired water parameters, grain size, and plant needs before choosing a substrate. Explore our selection below, with care tips and FAQs farther down the page.

Choosing Gravel, Sand, or Aquasoil

Gravel is a versatile decorative option. Soft sand is popular for Corydoras and other foraging bottom dwellers. Active aquasoil can buffer water and support planted tanks, while inert substrates such as Seachem Flourite provide root support but may still need fertilizers or root tabs.

Best sellers

Some substrates earn a permanent spot on our shelves. The Fluval Stratum Plant & Shrimp Substrate is an active volcanic soil that promotes lush root growth and suits both planted and shrimp tanks beautifully, while Seachem Flourite Black is a premium clay-based substrate that supports plant roots and lasts indefinitely. For a natural sand look, CaribSea Super Naturals Torpedo Beach offers smooth, freshwater-safe grains, and Seachem Flourite Black Sand combines the fine texture of sand with the plant-friendly benefits of Flourite.

Choosing the right substrate

The best substrate depends on what you keep. For a planted tank full of live plants, active aquasoil such as Stratum can supply some nutrients, while inert clay substrates such as Flourite may require root tabs or fertilizers. Shrimp tanks benefit from buffering active soils that help maintain stable, slightly acidic water for Caridina and other sensitive species. Community tanks do well on classic gravel or sand, and tanks for cichlids often pair best with sand or a specialty buffering substrate that suits their water needs. If you keep corydoras and other bottom dwellers, soft sand helps protect their delicate barbels as they forage.

Explore more

Once you have your substrate picked out, finish the job with the right gear. Browse our live aquarium plants to fill out an aquascape, and grab aquascaping tools to plant, sculpt, and maintain your layout cleanly. With the right foundation and a few good tools, building a beautiful, healthy tank is a lot more rewarding.

Substrate does more than look good — it is a living part of your filtration system. The surface area between every grain gives beneficial bacteria a place to colonize, helping support biological filtration that processes ammonia and nitrite. That is why we recommend choosing a substrate early and disturbing it as little as possible once your tank is established, since the bacteria living in it are doing important work around the clock.

Color and grain size matter too. Darker substrates tend to make fish colors pop and give planted tanks a rich, professional look, while lighter sands create bright, open aquascapes. Finer grains suit delicate plant roots and bottom dwellers, while slightly larger gravel is easy to clean with a siphon. Thinking about both the look you want and the livestock you keep will help you land on a substrate you are happy with for years.

Aquarium Substrate FAQ

How much substrate do I need?
A good rule of thumb is about 1 to 2 inches of substrate for most aquariums, or 2 to 3 inches for planted tanks so roots have room to spread. As a rough guide, plan on about 1 to 1.5 pounds of substrate per gallon, depending on the depth you want.

Do I need to rinse substrate before adding it?
Rinse inert gravel and sand well to remove dust before adding them to your aquarium. Active plant soils like Fluval Stratum should not be rinsed, since rinsing can break down the granules. Add them gently and expect some initial cloudiness that clears as the tank settles.

Can I mix different substrates?
Yes. Many aquascapers cap a nutrient-rich plant soil with a thin layer of sand or fine gravel for a cleaner look, or combine colors and textures to create depth. Check the manufacturer’s guidance before capping active aquasoil; layers can mix over time and substrate design affects plant growth and cleaning.