Aquarium Sand & Gravel

Sand and gravel are used as aquarium substrate, which provides a natural filter and breeding ground for beneficial bacteria, as well as a natural habitat.

Saltwater aquarium sand is often made of aragonite, calcium carbonate material that slowly releases calcium and raises pH (except black aquarium sand).

Live sand is shipped wet with beneficial bacteria, reducing time to cycle an aquarium. Dry sand ships without bacteria but becomes filled with life over time. CaribSea sugar sand is very fine, allowing a lot of bacterial filtration, but is easily stirred up. A medium grain sand is always a great choice.

A 1-2 inch sand bed is ideal for most saltwater aquariums. Some reef tanks use refugium mud, which harbors bacteria and releases trace elements. Use our sand bed calculator to determine how much you need.

Freshwater aquarium gravel comes in many colors and shapes. Most freshwater aquarium can use any fish tank sand or gravel, except reef sand, which raises the pH.
36 Results
Ecosystem Aquarium Miracle Mud (Marine)10 lb

Ecosystem Aquarium Miracle Mud (Marine)10 lb

Ecosystem Aquarium Miracle Mud (Marine) 5 lb

Ecosystem Aquarium Miracle Mud (Marine) 5 lb

CaribSea Arag-Alive Hawaiian Black Sand 20 lb

CaribSea Arag-Alive Hawaiian Black Sand 20 lb

CaribSea Aragamax Sugar-Sized Sand 30 lb

CaribSea Aragamax Sugar-Sized Sand 30 lb

CaribSea Super Natural, Torpedo Beach Sand 20lb

CaribSea Super Natural, Torpedo Beach Sand 20lb

Ecosystem Aquarium Miracle Mud (Marine) 2 lb

Ecosystem Aquarium Miracle Mud (Marine) 2 lb

CaribSea Arag-Alive Bimini Pink Sand 10 lb

CaribSea Arag-Alive Bimini Pink Sand 10 lb

CaribSea Ocean Direct Live Sand Oolite 20 lb

CaribSea Ocean Direct Live Sand Oolite 20 lb

CaribSea Arag-Alive Bahama Oolite Sand 20 Lb

CaribSea Arag-Alive Bahama Oolite Sand 20 Lb

Seachem Laboratories Flourite Black Sand - 7Kilograms / 15.4 lbs

Seachem Laboratories Flourite Black Sand - 7Kilograms / 15.4 lbs

CaribSea Eco-Complete Planted Aquarium Substrate 20 lb

CaribSea Eco-Complete Planted Aquarium Substrate 20 lb

CaribSea Dry Aragonite Fiji Pink Reef Sand 15 lb

CaribSea Dry Aragonite Fiji Pink Reef Sand 15 lb

CaribSea Ocean Direct Live Sand Oolite 40 lb

CaribSea Ocean Direct Live Sand Oolite 40 lb

CaribSea Arag-Alive Indo-Pacific Black Sand 20 lb

CaribSea Arag-Alive Indo-Pacific Black Sand 20 lb

CaribSea Mineral Mud Refugium Substrate 1 Gallon

CaribSea Mineral Mud Refugium Substrate 1 Gallon

CaribSea Arag-Alive Hawaiian Black Sand 10 lb

CaribSea Arag-Alive Hawaiian Black Sand 10 lb

Stax Rock Flat Aquascaping Rocks by Two Little Fishies - 40 LBS

Stax Rock Flat Aquascaping Rocks by Two Little Fishies - 40 LBS

Seachem Laboratories Flourite Premium Gravel - 7Kilograms / 15.4 lbs

Seachem Laboratories Flourite Premium Gravel - 7Kilograms / 15.4 lbs

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