1-888-9-WEBPETS
(1-888-993-2738)
Certified Seal
Dogs Cats Fish Birds Reptiles Small Pets Pond

Additives & Supplements

Aquarium Supplies

Fish Additives & Supplements

We carry a wide variety of additives produced by the most respected companies serving the aquarium hobby, such as Kent Marine, E.S.V., Seachem and Two Little Fishies. 2-part Calcium and Alkalinity Supplements are popular additives among reef keepers since calcium and alkalinity tend to deplete quickly in a reef aquarium.

Grid List

Set Ascending Direction

8 Item(s)

per page
  1. Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement - 1 Liter each

    Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement - 1 Liter each

    Be First to Review

    Reef Fusion 1™ and Reef Fusion 2™ are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1™ provides calcium, while Reef Fusion 2™ provides alkalinity. When used together, the Reef F...
    ONLY
    $22.98
  2. Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement - 4 Liter each

    Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement - 4 Liter each

    Be First to Review

    Reef Fusion 1™ and Reef Fusion 2™ are the foundation of a system formulated to provide the essentials for the reef aquarium. Reef Fusion 1™ provides calcium, while Reef Fusion 2™ provides alkalinity. When used together, the Reef F...
    ONLY
    $51.78
  3. AquaMaxx Synergy Plus 2-Part Calcium & Alkalinity Supplements - 64 oz. (32 oz. Each Bottle)

    AquaMaxx Synergy Plus 2-Part Calcium & Alkalinity Supplements - 64 oz. (32 oz. Each Bottle)

    Be First to Review

    AquaMaxx Synergy Plus is concentrated and ionically balanced. This calcium and alkalinity supplement work synergistically to help maintain and stabilize the Calcium, alkalinity and pH levels in your aquarium. The `Plus` being the ...
    ONLY
    $19.49
  4. AquaMaxx Synergy Plus 2-Part Calcium & Alkalinity Supplements - 32 oz. (16 oz. each bottle)

    AquaMaxx Synergy Plus 2-Part Calcium & Alkalinity Supplements

    Read 2 Reviews

    Write a Review

    New! AquaMaxx Synergy Plus- Ionic Balanced Calcium & Alkalinity Supplement AquaMaxx Synergy Plus is concentrated and ionically balanced. This calcium and alkalinity supplement work synergistically to help maintain and stabilize...
    FROM ONLY
    $12.49
  5. Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement - 500ml each

    Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement - 500ml each

    If you are running a coral reef tank , there's one thing you have to make sure: You need a constant supply of calcium in the water. Corals use up calcium to form their exoskeletons. Without calcium, they will not be able to form...
    ONLY
    $14.38
  6. Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement - 2 Liter each

    Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement - 2 Liter each

    Be First to Review

    Are you having some difficulties with achieving a balanced calcium and alkalinity level inside your tank? Maintain the equilibrium of these two essential elements in your tank by using the Seachem Reef Fusion Two Part System 1 & 2...
    ONLY
    $34.58
  7. AquaMaxx Synergy Plus 2-Part Calcium & Alkalinity Supplements - 32 oz. (16 oz. each bottle)

    AquaMaxx Synergy Plus 2-Part Calcium & Alkalinity Supplements - 32 oz. (16 oz. each bottle)

    AquaMaxx Synergy Plus is concentrated and ionically balanced. This calcium and alkalinity supplement work synergistically to help maintain and stabilize the Calcium, alkalinity and pH levels in your aquarium. The `Plus` being the ...
    ONLY
    $12.49
  8. Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement - 500ml each

    Seachem Reef Fusion Two Part System 1 & 2 Calcium and Carbonate Supplement

    Read 10 Reviews

    Write a Review

    If you are running a coral reef tank , there's one thing you have to make sure: You need a constant supply of calcium in the water. Corals use up calcium to form their exoskeletons. Without calcium, they will not be able to form...
    FROM ONLY
    $14.38

Grid List

Set Ascending Direction

8 Item(s)

per page