Substrates

Items 97 to 144 of 185 total

Adding the right substrate can do wonders for your aquarium. Not only will it enhance the appearance of your aquarium, but it will also make sure that your fish get the ideal filtration and water chemistry for their needs. To make sure every fish keeper is able to provide the best for their pets, Big Al’s Pets offers a huge selection of over 100 aquarium substrates. From sand to gravel to other textures and sizes, there’s something for everyone in this collection. Plus, the large variety of products ensures that your fish have a healthy environment while you also get your choice of price point, brand, and desired aesthetic.

When you browse our selection of products, you’ll soon see that each substrate offers its own unique benefits, like added minerals and nutrients, pH maintenance, or clarifying abilities. Plus, you’ll be able to find the perfect color to decorate your aquarium thanks to the huge variety of options.
  • CaribSea Arag-Alive! Bahamas Oolite - 20 lb
    Bring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae.

    Regular Price: USD 24.99

    Sale Price USD 16.99

    Regular Price: USD 24.99

    Sale Price USD 16.99

  • CaribSea Seaflor Aruba Puka Shell - 18 lb
    CaribSea Seaflor products are the perfect shell substrates! They are clean and pure with no dangerous impurities to threaten your aquarium. These products may be used on their own, or as colorful admixtures to other substrates.

    Regular Price: USD 21.99

    Sale Price USD 15.99

    Regular Price: USD 21.99

    Sale Price USD 15.99

  • CaribSea Seaflor Special Grade Reef Sand - 40 lb
    CaribSea aragonite is purposely engineered and free of impurities such as ash, metals, pesticides, and silica which allows you to create a safe and beautiful environment for your fish and invertebrates.

    Regular Price: USD 41.99

    Sale Price USD 29.99

    Regular Price: USD 41.99

    Sale Price USD 29.99

  • CaribSea Seaflor Special Grade Reef Sand - 15 lb
    CaribSea aragonite is purposely engineered and free of impurities such as ash, metals, pesticides, and silica which allows you to create a safe and beautiful environment for your fish and invertebrates.

    Regular Price: USD 18.99

    Sale Price USD 12.99

    Regular Price: USD 18.99

    Sale Price USD 12.99

  • CaribSea Aragamax Sugar-Sized Sand - 30 lb
    CaribSea aragonite is purposely engineered and free of impurities such as ash, metals, pesticides, and silica which allows you to create a safe and beautiful environment for your fish and invertebrates.

    Regular Price: USD 26.99

    Sale Price USD 18.99

    Regular Price: USD 26.99

    Sale Price USD 18.99

  • CaribSea Arag-Alive! Fiji Pink - 20 lb
    Bring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae.

    Regular Price: USD 24.99

    Sale Price USD 17.99

    Regular Price: USD 24.99

    Sale Price USD 17.99

  • CaribSea Fiji Pink Reef Sand - 40 lb
    CaribSea aragonite is purposely engineered and free of impurities such as ash, metals, pesticides, and silica which allows you to create a safe and beautiful environment for your fish and invertebrates.

    Regular Price: USD 44.99

    Sale Price USD 35.99

    Regular Price: USD 44.99

    Sale Price USD 35.99

  • Carib Sea Arag-Alive Hawaiian Black - 10 lb
    Bring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae.

    Regular Price: USD 23.99

    Sale Price USD 12.99

    Regular Price: USD 23.99

    Sale Price USD 12.99

    Out of stock

  • CaribSea Super Naturals Peace River - 5 lb
    • Sizes and colors were selected to re-create natural jungle environments
    • Suitable for freshwater and marine aquariums with proper maintenance
    • Pre-washed, pH neutral & allows the beneficial bacteria to build colonies
    • Prevents reflections from the base of the aquarium from aggravating fish

    Regular Price: USD 4.99

    Sale Price USD 2.99

    Regular Price: USD 4.99

    Sale Price USD 2.99

    Out of stock

  • CaribSea Super Naturals Moonlight Sand - 20 lb
    • Sizes and colors were selected to re-create natural jungle environments
    • Suitable for freshwater and marine aquariums with proper maintenance
    • Pre-washed, pH neutral & allows the beneficial bacteria to build colonies
    • Prevents reflections from the base of the aquarium from aggravating fish

    Regular Price: USD 19.99

    Sale Price USD 15.99

    Regular Price: USD 19.99

    Sale Price USD 15.99

  • CaribSea Arag-Alive Special Grade Reef Sand - 20 lb
    Bring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae.

    Regular Price: USD 25.99

    Sale Price USD 18.99

    Regular Price: USD 25.99

    Sale Price USD 18.99

  • CaribSea Arag-Alive Special Grade Reef Sand - 10 lb
    Bring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae.

    Regular Price: USD 23.99

    Sale Price USD 11.99

    Regular Price: USD 23.99

    Sale Price USD 11.99

  • Carib Sea African Cichlid Mix Sahara Sand - 20 lb
    CaribSea's cichlid gravels naturally buffer your aquarium water with aragonite, simplifying the process or replicatiing the water parameters of the great African rift lakes, and eliminating downward drift in pH in established tanks.

    Regular Price: USD 16.99

    Sale Price USD 10.99

    Regular Price: USD 16.99

    Sale Price USD 10.99

  • CaribSea Ocean Direct Live Oolite - 40 lb
    Each bag includes a packet of Bio-Magnet clarifier to reposition free-floating bacteria to where they are most active; sand beds, live rock surfaces, and to biological filtration media. Ocean Direct provides a thriving, natural aquarium in minutes!

    Regular Price: USD 37.99

    Sale Price USD 25.99

    Regular Price: USD 37.99

    Sale Price USD 25.99

  • CaribSea Ocean Direct Live Oolite - 5 lb
    Each bag includes a packet of Bio-Magnet clarifier to reposition free-floating bacteria to where they are most active; sand beds, live rock surfaces, and to biological filtration media. Ocean Direct provides a thriving, natural aquarium in minutes!

    Regular Price: USD 6.99

    Sale Price USD 4.99

    Regular Price: USD 6.99

    Sale Price USD 4.99

  • CaribSea Ocean Direct Caribbean Live Sand - 40 lb
    Each bag includes a packet of Bio-Magnet clarifier to reposition free-floating bacteria to where they are most active; sand beds, live rock surfaces, and to biological filtration media. Ocean Direct provides a thriving, natural aquarium in minutes!

    Regular Price: USD 29.99

    Sale Price USD 23.99

    Regular Price: USD 29.99

    Sale Price USD 23.99

  • CaribSea Ocean Direct Caribbean Live Sand - 5 lb
    Each bag includes a packet of Bio-Magnet clarifier to reposition free-floating bacteria to where they are most active; sand beds, live rock surfaces, and to biological filtration media. Ocean Direct provides a thriving, natural aquarium in minutes!

    Regular Price: USD 7.99

    Sale Price USD 4.99

    Regular Price: USD 7.99

    Sale Price USD 4.99

  • CaribSea Refugium Mineral Mud - 1 gal
    A unique blend of sediments that duplicate tropical fringing coastal mangrove environments. Ideal for mud refugiums, macro-algaes, and mangroves. Provides trace elements, chelated trace elements, calcium, strontium, iron, sulfur and free carbon.

    Regular Price: USD 38.99

    Sale Price USD 26.99

    Regular Price: USD 38.99

    Sale Price USD 26.99

    Out of stock

  • Carib Sea African Cichlid Mix Ivory Coast Gravel - 20 lb
    CaribSea's cichlid gravels naturally buffer your aquarium water with aragonite, simplifying the process or replicatiing the water parameters of the great African rift lakes, and eliminating downward drift in pH in established tanks.

    Regular Price: USD 17.99

    Sale Price USD 12.99

    Regular Price: USD 17.99

    Sale Price USD 12.99

  • CaribSea Instant Aquarium Sunset Gold - 20 lb
    CaribSea's Instant Aquarium takes the guess work out of starting a new tank. This line of substrates offers a variety of gravels and sands water-packed with living, water-purifying bacteria, state of the art clarifier, and a complete water conditioner.

    Regular Price: USD 21.99

    Sale Price USD 14.99

    Regular Price: USD 21.99

    Sale Price USD 14.99

  • CaribSea Instant Aquarium Moonlight Sand - 20 lb
    CaribSea's Instant Aquarium takes the guess work out of starting a new tank. This line of substrates offers a variety of gravels and sands water-packed with living, water-purifying bacteria, state of the art clarifier, and a complete water conditioner.

    Regular Price: USD 22.99

    Sale Price USD 14.99

    Regular Price: USD 22.99

    Sale Price USD 14.99

  • CaribSea Arag-Alive Hawaiian Black - 20 lb
    Bring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae.

    Regular Price: USD 24.99

    Sale Price USD 16.99

    Regular Price: USD 24.99

    Sale Price USD 16.99

  • Carib Sea African Cichlid Mix - 20 lb
    CaribSea's cichlid gravels naturally buffer your aquarium water with aragonite, simplifying the process or replicatiing the water parameters of the great African rift lakes, and eliminating downward drift in pH in established tanks.

    Regular Price: USD 16.99

    Sale Price USD 11.99

    Regular Price: USD 16.99

    Sale Price USD 11.99

    Out of stock

  • Carib Sea Ocean Direct Live Oolite
    Each bag includes a packet of Bio-Magnet clarifier to reposition free-floating bacteria to where they are most active; sand beds, live rock surfaces, and to biological filtration media. Ocean Direct provides a thriving, natural aquarium in minutes!

    Price From: USD 4.99

    Price From: USD 4.99

  • CaribSea Super Naturals Joe's Creek - 5 lb
    • Sizes and colors were selected to re-create natural jungle environments
    • Suitable for freshwater and marine aquariums with proper maintenance
    • Pre-washed, pH neutral & allows the beneficial bacteria to build colonies
    • Prevents reflections from the base of the aquarium from aggravating fish
    • Prevents the unwanted light fixture reflections

    Regular Price: USD 4.99

    Sale Price USD 3.49

    Regular Price: USD 4.99

    Sale Price USD 3.49

  • Seapora Betta Gravel - Dark Blue - 350 g
    • Betta gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc

    Regular Price: USD 2.99

    Sale Price USD 1.99

    Regular Price: USD 2.99

    Sale Price USD 1.99

  • Seapora Betta Gravel - Green - 350 g
    • Betta gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc

    Regular Price: USD 2.99

    Sale Price USD 1.99

    Regular Price: USD 2.99

    Sale Price USD 1.99

  • Seapora Betta Gravel - Blue - 350 g
    • Betta gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc

    Regular Price: USD 2.99

    Sale Price USD 1.99

    Regular Price: USD 2.99

    Sale Price USD 1.99

  • Seapora Betta Gravel - Black - 350 g
    • Betta gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc

    Regular Price: USD 2.99

    Sale Price USD 1.99

    Regular Price: USD 2.99

    Sale Price USD 1.99

  • Seapora Betta Gravel - Clear - 350 g
    • Betta gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc

    Regular Price: USD 2.99

    Sale Price USD 1.99

    Regular Price: USD 2.99

    Sale Price USD 1.99

  • Aqua One Decorative Gravel - Black Ice - 500 g
    • Decorative gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Designer substrate is made from natural, non-toxic stone
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc.

    Regular Price: USD 3.99

    Sale Price USD 1.99

    Regular Price: USD 3.99

    Sale Price USD 1.99

  • Aqua One Decorative Gravel - Red Hot - 500 g
    • Decorative gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Designer substrate is made from natural, non-toxic stone
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc.

    Regular Price: USD 3.99

    Sale Price USD 1.99

    Regular Price: USD 3.99

    Sale Price USD 1.99

  • Aqua One Decorative Gravel - Spinafex - 500 g
    • Decorative gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Designer substrate is made from natural, non-toxic stone
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc.

    Regular Price: USD 3.99

    Sale Price USD 1.39

    Regular Price: USD 3.99

    Sale Price USD 1.39

  • Aqua One Decorative Gravel - Forrest - 500 g
    • Decorative gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Designer substrate is made from natural, non-toxic stone
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc.

    Regular Price: USD 3.99

    Sale Price USD 1.39

    Regular Price: USD 3.99

    Sale Price USD 1.39

  • Aqua One Decorative Gravel - Carnival - 500 g
    • Decorative gravel enhances the appearance of your aquarium
    • Provides an excellent cultivation site for beneficial bacteria
    • Designer substrate is made from natural, non-toxic stone
    • Suitable for use in freshwater and saltwater aquariums
    • Also great for decorating potted plants, candle holders, etc.

    Regular Price: USD 3.99

    Sale Price USD 0.99

    Regular Price: USD 3.99

    Sale Price USD 0.99

  • Fluval Stratum - 17.6 lb
    • Volcanic soil from the foothills of Mount Aso Volcano
    • Ideal substrate for growth of freshwater aquatic plants
    • Packed with readily available minerals and nutrients
    • Supports nitrifying bacteria to help maintain water quality
    • Perfect for shrimp - protects newborns from predation!

    Regular Price: USD 38.99

    Sale Price USD 29.99

    Regular Price: USD 38.99

    Sale Price USD 29.99

  • Fluval Stratum - 8.8 lb
    • Volcanic soil from the foothills of Mount Aso Volcano
    • Ideal substrate for growth of freshwater aquatic plants
    • Packed with readily available minerals and nutrients
    • Supports nitrifying bacteria to help maintain water quality
    • Perfect for shrimp - protects newborns from predation!

    Regular Price: USD 22.99

    Sale Price USD 17.99

    Regular Price: USD 22.99

    Sale Price USD 17.99

  • Fluval Stratum - 4.4 lb
    • Volcanic soil from the foothills of Mount Aso Volcano
    • Ideal substrate for growth of freshwater aquatic plants
    • Packed with readily available minerals and nutrients
    • Supports nitrifying bacteria to help maintain water quality
    • Perfect for shrimp - protects newborns from predation!

    Regular Price: USD 15.99

    Sale Price USD 9.99

    Regular Price: USD 15.99

    Sale Price USD 9.99

  • CaribSea Super Naturals Sri Lanka - 5 lb
    • Sizes and colors were selected to re-create natural jungle environments
    • Suitable for freshwater and marine aquariums with proper maintenance
    • Pre-washed, pH neutral & allows the beneficial bacteria to build colonies
    • Prevents reflections from the base of the aquarium from aggravating fish
    • Prevents the unwanted light fixture reflections

    Regular Price: USD 4.99

    Sale Price USD 2.99

    Regular Price: USD 4.99

    Sale Price USD 2.99

  • CaribSea Super Naturals Joe's Creek - 20 lb
    • Sizes and colors were selected to re-create natural jungle environments
    • Suitable for freshwater and marine aquariums with proper maintenance
    • Pre-washed, pH neutral & allows the beneficial bacteria to build colonies
    • Prevents reflections from the base of the aquarium from aggravating fish
    • Prevents the unwanted light fixture reflections

    Regular Price: USD 21.99

    Sale Price USD 15.99

    Regular Price: USD 21.99

    Sale Price USD 15.99

  • CaribSea Super Naturals Sri Lanka - 20 lb
    • Sizes and colors were selected to re-create natural jungle environments
    • Suitable for freshwater and marine aquariums with proper maintenance
    • Pre-washed, pH neutral & allows the beneficial bacteria to build colonies
    • Prevents reflections from the base of the aquarium from aggravating fish
    • Prevents the unwanted light fixture reflections

    Regular Price: USD 19.99

    Sale Price USD 15.99

    Regular Price: USD 19.99

    Sale Price USD 15.99

  • Carib Sea Ocean Direct Caribbean Live Sand
    Each bag includes a packet of Bio-Magnet clarifier to reposition free-floating bacteria to where they are most active; sand beds, live rock surfaces, and to biological filtration media. Ocean Direct provides a thriving, natural aquarium in minutes!

    Price From: USD 4.99

    Price From: USD 4.99

  • Carib Sea African Cichlid Mix Ivory Coast Gravel
    CaribSea's cichlid gravels naturally buffer your aquarium water with aragonite, simplifying the process of replicatiing the water parameters of the great African rift lakes, and eliminating downward drift in pH in established tanks.

    Price From: USD 12.99

    Price From: USD 12.99

  • Carib Sea Instant Aquarium Sunset Gold
    CaribSea's Instant Aquarium takes the guess work out of starting a new tank. This line of substrates offers a variety of gravels and sands water-packed with living, water-purifying bacteria, state of the art clarifier, and a complete water conditioner.

    Price From: USD 14.99

    Price From: USD 14.99

  • Carib Sea Instant Aquarium Moonlight Sand
    CaribSea's Instant Aquarium takes the guess work out of starting a new tank. This line of substrates offers a variety of gravels and sands water-packed with living, water-purifying bacteria, state of the art clarifier, and a complete water conditioner.

    Price From: USD 14.99

    Price From: USD 14.99

  • Carib Sea Arag-Alive Hawaiian Black
    Bring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae.

    Price From: USD 12.99

    Price From: USD 12.99

  • Carib Sea Arag-Alive! Fiji Pink
    Bring the world's most exotic reefs into your home with CaribSea's Arag-Alive substrates. Helps maintain a proper pH for the life of your aquarium without the constant addition of chemicals, and creates a biological balance to discourage nuisance algae.

    Price From: USD 12.99

    Price From: USD 12.99

  • Carib Sea Geo-Marine Florida Crushed Coral
    CaribSea's Geo-Marine Florida Crushed Coral is the only crushed coral with aragonite and provides over 25 times the buffering capacity of other crushed corals.

    Price From: USD 5.99

    Price From: USD 5.99

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