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Calcium KalkwasserCalcium Kalkwasser

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Seachem Reef Advantage Calcium 250gm 8.8oz

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Instant Ocean Calcium Booster 250 ml

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Seachem Reef Advantage Calcium 500gm 1.1lb

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Seachem Reef Calcium 500ml 17oz

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Aqua Vision Aquatics Precision Calcium - 16oz

FreshMarine:$10.99

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CaribSea AragaMIGHT Calcium Supplement

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Caribsea ReefCal Ionic Calcium Solution 16oz

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E.S.V. Calcium Chloride 800 g

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E.S.V. Calcium Hydroxide 1lb

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E.S.V. Calcium Hydroxide 4 lb

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Elos Prima Line 05 Combi Calcium 500mL

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Kent Marine Kalkwasser 100 g

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Kent Marine Kalkwasser 225 g

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Kent Marine Kalkwasser 450 g

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Kent Marine Liquid Calcium 16 oz.

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Kent Marine Liquid Calcium 64 oz.

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Kent Marine Liquid Calcium 8 oz.

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Kent Marine Liquid Calcium Reactor 16 oz.

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Kent Marine Liquid Calcium Reactor 64 oz.

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Kent Marine Turbo Calcium 400 g

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Kent Marine Turbo Calcium 800 g (1 Qt)

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Prodibio CalciReef+ - 10 vials

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Red Sea Reef Foundation Supplement (Ca/Sr) - 1kg

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Seachem Laboratories Reef Calcium - 100mL

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Seachem Laboratories Reef Calcium - 2 Liters

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Seachem Laboratories Reef Calcium - 250mL

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Seachem Laboratories Reef Calcium - 500mL

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Two Little Fishies Peter Wilkens Kalkwassar 1Lb

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Two Little Fishies Peter Wilkens Kalkwassar 4 Lb

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Calcium Kalkwasser

Calcium is a much-needed element in a Marine or Reef Aquarium, as Corals need it for their growth and development and to stay attached to their exoskeleton. This Calcium gap is well fulfilled by one of its best supplement forms, Calcium Kalkwasser, which contains Calcium Hydroxide and a type of Calcium, known as Pure Calcium. Calcium Kalkwasser raises the pH and KH/alkalinity levels of the aquarium water to keep these parameters to the desired levels, which are otherwise disturbed due to evaporation. Fresh Marine offers a broad spectrum of Calcium Kalkwasser from some of the market leaders. The ensuing discussion deals with some of the bestsellers.

Precision Kalkwasser by Blue Life. This Calcium Kalkwasser, apart from acting as a Calcium supplement, also helps maintain the pH & KH/alkalinity, and facilitates Protein Skimming & Phosphates precipitation. Precision Kalkwasser consists of USP Grade chemicals, which is a mark of assurance that the mix does not contain the excess of metals and/or other organic compounds, which may prove harmful to your aquarium water.

Calcium Kalkwasser by Kent Marine.
  • Kent Marine Kalkwasser Mix. This Calcium Kalkwasser furnishes bio-available Calcium to Purple, Pink, & Green Calcareous Algae, Snails, Hard Tube Worms, and Clams. After some applications of Kalkwasser Mix, Corals tend to open more and stay attached to their skeletons more firmly. The product is free of harmful Phosphate, Nitrate, Gluconates, EDTA, and other organic compounds used to raise DOC levels. For optimal results, mix this Calcium Kalkwasser with Kent Marine Concentrated Liquid Calcium or Turbo Calcium. Kent Marine Strontium & Molybdenum Supplement or Turbo Strontium can do the vital Strontium supplementation. Administration of Coral Vite and Essential Elements are also useful. Kent Marine Liquid Calcium and Kent Marine Turbo Calcium are a couple of other similar products in the category.
  • Kent Marine Liquid Reactor. This Calcium Kalkwasser is a Calcium Buffer, which well replaces any Calcium Reactor Systems, CO2 Tank, Solenoid, and pH Controller, with practically no chances of CO2 overdose, which in turn lead to algae health and/or pH implications. Liquid Reactor raises the concentrations of Calcium, Magnesium, Strontium, and Carbonates (alkalinity) in the system, while being Chloride, Phosphate, Nitrate, and Gluconate free.
  • Kent Marine Tech CB. This Calcium Kalkwasser comes in two parts, Part A and Part B, with each of them being half of an ionic balanced, Calcium supplemented, and alkalinity control mix. Both, Part A & Part B, are to be used together in equal amounts, which work together to boost the Calcium and the Alkalinity levels in an aquarium. This product is free of Phosphate, Nitrate, and Gluconate. The formula contains Cationic Calcium as Calcium Carbonate, and generates an ionic residue similar in composition to that of natural seawater. A regular use of the product in an aquarium has shown boost in the growth rate of its inmates.


  • Calcium Kalkwasser by Seachem.
  • Seachem Reef Advantage Calcium by Seachem. This Calcium Kalkwasser is a non-caustic (pH 8.3-8.6), Ionic Calcium, which restores and stabilizes the Calcium quantity in the aquarium water to the desired level without lowering the Magnesium levels therein. In addition, Reef Advantage Calcium also contains an optimally effective mix of Magnesium and Strontium, which keeps the aquarium water stabilized for these elements too. This allows one to maintain these two important elements while maintaining calcium.
  • Seachem Reef Kalkwasser. This Calcium Kalkwasser is pure and optimally soluble Calcium Hydroxide, which compensates for the mineral loss in the aquarium water due to evaporation. The solution replenishes Calcium directly in the aquarium water, while it indirectly boosts the water’s alkalinity. In addition, Reef Kalkwasser also precipitates Phosphates and other impurities from water, while keeping the aquarium water pH high, which is required for the complete Calcification and for Oxidizing different organic substances present in a Reef Aquarium.


  • CaribSea AragaMilk by CaribSea. This Calcium Kalkwasser is safe to use and its minerals are available in the aquarium water in the solution form with a pH of about 8.2. The solution also stabilizes the Carbonate Hardness (KH) of the aquarium water to the desired level, which in turn checks harmful KH levels. Disbalanced KH may result in fish “shock,” with implications as extreme as their death.

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