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Calcium

Calcium Supplements

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Corals, clams and certain types of algae have to have calcium in order to grow. They consume calcium and can quickly deplete the supply. Ocean water has a calcium level that ranges from 380 - 450 mg/L. It can be difficult or impossible to keep the levels this high in a home aquarium. But, there are several ways that you can increase the calcium levels. One of the most popular ways is by using reactors.

Calcium reactors can be used to add dosages of calcium to your aquarium. And, Kalkreactors can add dosages of Kalkwasser. If you prefer you can also use a diluted calcium chloride to dose, but it is more expensive. Liquid calcium also poses a problem. You will need to use carbonate or bicarbonate as a buffer because you are taking the risk of lowering the levels of alkalinity. If this method is something you are interested in, you may want to consider using a two part calcium/alkalinity solution.

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  • All For Reef (1000 ml) - Tropic Marin

    All For Reef (1000 ml) - Tropic Marin

    Tropic Marin

    $36.83
    ALL-FOR-REEF is an easy- to-use, highly concentrated solution for the supply of ALL essential minerals and trace elements in new or moderately stocked reef aquariums. Benefits: Complete mineral supply in only one solution The most...
  • All For Reef Powder (1600g) - Tropic Marin

    All For Reef Powder (1600g) - Tropic Marin

    Tropic Marin

    $75.04
    Tropic Marin® All-For-Reef Powder is an ultra-concentrated mineral blend, with which an easy-to-use, highly concentrated all-round solution for supplying all key minerals and trace elements in newly established and averaged reef aquariums...
  • On Sale 15%
    Sea Lab #28 Automatic Replenisher 24 Blocks (2 lb Box) - Sea-Lab
    On Sale 15%

    Sea Lab #28 Automatic Replenisher 24 Blocks (2 lb Box) - Sea-Lab

    All Misc Brands

    $29.99
    $25.49
    Automatically controls concentrations of 28 elements including calcium, strontium and all 15 essential trace elements. Removes heavy metals and limits ammonia and phosphate while helping to buffer aquarium pH. Available in: 1/2 lb Container (as pictured)...
  • Reef Foundation A - Calcium (CA) (1000 ml) Liquid - Red Sea

    Reef Foundation A - Calcium (CA) (1000 ml) Liquid - Red Sea

    Red Sea

    $28.99
    Calcium+ Supplement Calcium and Strontium complex for balanced formation of the coral skeleton It’s all in the balance Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.All of these elements...
  • All For Reef Powder (800g) - Tropic Marin

    All For Reef Powder (800g) - Tropic Marin

    Tropic Marin

    $47.18
    Tropic Marin® All-For-Reef Powder is an ultra-concentrated mineral blend, with which an easy-to-use, highly concentrated all-round solution for supplying all key minerals and trace elements in newly established and averaged reef aquariums...
  • All For Reef (500 ml) - Tropic Marin

    All For Reef (500 ml) - Tropic Marin

    Tropic Marin

    $21.82
    ALL-FOR-REEF is an easy- to-use, highly concentrated solution for the supply of ALL essential minerals and trace elements in new or moderately stocked reef aquariums. Benefits: Complete mineral supply in only one solution The most...
  • On Sale 15%
    44 lbs ReBorn (Original Size) Calcium Reactor Media (44 lbs) -  Two Little Fishies
    On Sale 15%

    44 lbs ReBorn (Original Size) Calcium Reactor Media (44 lbs) - Two Little Fishies

    Two Little Fishies

    $169.99
    $144.49
    Reborn is back to it's original size & formulation.  Large size pieces. Reborn® coarse aragonite media for calcium reactors is composed of fossil skeletons of reef building corals sustainably harvested from pristine sites in the Western...
  • Reef Foundation A - Calcium (CA) (500 ml) Liquid - Red Sea

    Reef Foundation A - Calcium (CA) (500 ml) Liquid - Red Sea

    Red Sea

    $19.99
    Calcium+ Supplement Calcium and Strontium complex for balanced formation of the coral skeleton It’s all in the balance Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.All of these elements...
  • Reef Foundation A Dry - Calcium (CA) (1 KG) Powder - Red Sea

    Reef Foundation A Dry - Calcium (CA) (1 KG) Powder - Red Sea

    Red Sea

    $31.99
    Calcium+ Supplement Calcium and Strontium complex for balanced formation of the coral skeleton It’s all in the balance Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.All of these elements...
  • On Sale 15%
    Purple Up (16 oz) - Caribsea
    On Sale 15%

    Purple Up (16 oz) - Caribsea

    Caribsea

    $18.49
    $15.72
    PurpleUp™ - uses a unique dual method approach to coralline algae acceleration. This approach is so unique that PurpleUp has been awarded a US patent (US patent No. 7,565,883). It contains ionic calcium; which immediately raises dissolved calcium...
  • On Sale 15%
    Reef Fusion "1" Two Part Calcium/Buffer System (2 L) - Seachem
    On Sale 15%

    Reef Fusion "1" Two Part Calcium/Buffer System (2 L) - Seachem

    Seachem

    $21.44
    $18.22
    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...
  • Reef Foundation A - Calcium (CA) - (5 Liter / 1.32 Gal) - Red Sea

    Reef Foundation A - Calcium (CA) - (5 Liter / 1.32 Gal) - Red Sea

    Red Sea

    $109.00
    Calcium+ Supplement Calcium and Strontium complex for balanced formation of the coral skeleton It’s all in the balance Calcium, Magnesium, Strontium and Carbonate are the basic foundation elements of coral skeletons.All of these elements...
  • On Sale 15%
    Reef Advantage Calcium (1KG) - Seachem
    On Sale 15%

    Reef Advantage Calcium (1KG) - Seachem

    Seachem

    $26.74
    $22.73
    Reef Advantage Calcium™ is a non-caustic (pH 8.3–8.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater. Calcium and carbonates are essential to all coral growth. If either becomes...
  • On Sale 15%
    Purple Up (8 oz) - Caribsea
    On Sale 15%

    Purple Up (8 oz) - Caribsea

    Caribsea

    $11.75
    $9.99
    PurpleUp™ - uses a unique dual method approach to coralline algae acceleration. This approach is so unique that PurpleUp has been awarded a US patent (US patent No. 7,565,883). It contains ionic calcium; which immediately raises dissolved calcium...
  • On Sale 15%
    LITTLE ReBorn Calcium Reactor Media (8.8 lbs) -  Two Little Fishies
    On Sale 15%

    LITTLE ReBorn Calcium Reactor Media (8.8 lbs) - Two Little Fishies

    Two Little Fishies

    $35.66
    $30.31
    Reborn® coarse aragonite media for calcium reactors is composed of fossil skeletons of reef building corals sustainably harvested from pristine sites in the Western Pacific. When dissolved, ReBorn replenishes calcium and carbonate alkalinity,...
  • On Sale 15%
    Reef Complete (500 mL) - Seachem
    On Sale 15%

    Reef Complete (500 mL) - Seachem

    Seachem

    $11.33
    $9.63
    Reef Complete® is a concentrated (160,000 mg/L) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater without affecting pH. Calcium and carbonates are essential to all coral growth. If either...
  • On Sale 15%
    Reef Fusion "1" Two Part Calcium/Buffer System (4 L) - Seachem
    On Sale 15%

    Reef Fusion "1" Two Part Calcium/Buffer System (4 L) - Seachem

    Seachem

    $32.33
    $27.48
    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...
  • On Sale 15%
    Calcion P - Dry Calcium Supplement (800g) - Brightwell
    On Sale 15%

    Calcion P - Dry Calcium Supplement (800g) - Brightwell

    Brightwell Aquatics

    $23.58
    $20.04
    Calcium Supplement for All Marine Fish & Reef Aquaria Overview High-purity powdered calcium. Increases the concentration of calcium in marine aquarium water to provide corals andother reef-building invertebrates with one of the most important...
  • On Sale 15%
    Purple Up (1 Gallon) - Caribsea
    On Sale 15%

    Purple Up (1 Gallon) - Caribsea

    Caribsea

    $92.49
    $78.62
    PurpleUp™ - uses a unique dual method approach to coralline algae acceleration. This approach is so unique that PurpleUp has been awarded a US patent (US patent No. 7,565,883). It contains ionic calcium; which immediately raises dissolved calcium...
  • On Sale 15%
    Reef Complete (2L) - Seachem
    On Sale 15%

    Reef Complete (2L) - Seachem

    Seachem

    $40.61
    $34.52
    Reef Complete® is a concentrated (160,000 mg/L) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater without affecting pH. Calcium and carbonates are essential to all coral growth. If either...
  • On Sale 15%
    Reef Calcium (2L) - Seachem
    On Sale 15%

    Reef Calcium (2L) - Seachem

    Seachem

    $40.61
    $34.52
    Reef Calcium™ is a concentrated (50,000 mg/L) bioavailable polygluconate complexed calcium intended to maintain calcium in the reef aquarium without altering pH. Polygluconate complexation confers several benefits: it increases the bioavailability...
  • On Sale 15%
    Calcion - Liquid Calcium Supplement (2L) - Brightwell
    On Sale 15%

    Calcion - Liquid Calcium Supplement (2L) - Brightwell

    Brightwell Aquatics

    $40.64
    $34.54
    Concentrated Calcium Supplement for All Marine Fish & Reef Aquaria Overview Highly-concentrated ionic calcium solution. Increases the concentration of calcium in marine aquarium water to provide coralsand other reef-building invertebrates with...
  • On Sale 15%
    Reef Calcium (500 mL) - Seachem
    On Sale 15%

    Reef Calcium (500 mL) - Seachem

    Seachem

    $11.33
    $9.63
    Reef Calcium™ is a concentrated (50,000 mg/L) bioavailable polygluconate complexed calcium intended to maintain calcium in the reef aquarium without altering pH. Polygluconate complexation confers several benefits: it increases the bioavailability...
  • On Sale 15%
    Reef Advantage Calcium (4KG)- Seachem
    On Sale 15%

    Reef Advantage Calcium (4KG)- Seachem

    Seachem

    $96.71
    $82.20
    Reef Advantage Calcium™ is a non-caustic (pH 8.3–8.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater. Calcium and carbonates are essential to all coral growth. If either becomes...
  • On Sale 15%
    Reef Advantage Calcium (500g) - Seachem
    On Sale 15%

    Reef Advantage Calcium (500g) - Seachem

    Seachem

    $15.46
    $13.14
    Reef Advantage Calcium™ is a non-caustic (pH 8.3–8.6) optimized blend of ionic calcium designed to restore and maintain calcium to levels found in natural seawater. Calcium and carbonates are essential to all coral growth. If either becomes...
  • On Sale 15%
    Purple Up (4 oz) - Caribsea
    On Sale 15%

    Purple Up (4 oz) - Caribsea

    Caribsea

    $8.75
    $7.44
    PurpleUp™ - uses a unique dual method approach to coralline algae acceleration. This approach is so unique that PurpleUp has been awarded a US patent (US patent No. 7,565,883). It contains ionic calcium; which immediately raises dissolved calcium...
  • On Sale 15%
    Fritz RPM Liquid Calcium Elements (16 oz) Part 2 - Fritz
    On Sale 15%

    Fritz RPM Liquid Calcium Elements (16 oz) Part 2 - Fritz

    Fritz Aquatics

    $8.79
    $7.47
    It is impossible to maintain a healthy, vibrant marine aquarium without also maintaining the proper levels of calcium and alkalinity. FRITZ RPM CALCIUM/BUFFER SYSTEM allows aquarists to maintain these two critical components in their proper ionic balance...
  • Skeletal Elements - Reef Foundation ABC+ (5 KG Bucket) -  Red Sea

    Skeletal Elements - Reef Foundation ABC+ (5 KG Bucket) - Red Sea

    Red Sea

    $74.99
    "Foundation and trace element supplement for balanced formation of coral skeleton Ca | Mg | KH | Sr| Ba | K | I SKELETAL ELEMENTS is a blend of all of the corals foundation elements of coral skeletons: Calcium, magnesium, strontium & carbonate,...
  • Original Balling Set Powder (3 kg) - Tropic Marin

    Original Balling Set Powder (3 kg) - Tropic Marin

    Tropic Marin

    $45.39
    Tropic Marin® Original Balling Components are the three salts used in the Balling method to allow an independent dosage of calcium and carbonates adapted to each individual aquarium. The three part method adds calcium chloride dihydrate (part...