Calcium reactors are designed to produce calcium and alkalinity for your aquarium. They do this by using carbon dioxide (CO2) to dissolve old coral skeleton or other calcium carbonate media which is then dosed or dripped into the tank. When used properly, Calcium Reactors provide a very precise method of maintaining calcium and alkalinity levels within a reef aquarium.

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  • Calcium Reactor [4 in.]-ONLY 1 LEFT

    Calcium Reactor [4 in.]-ONLY 1 LEFT

    These reactors provide a simple solution for maintaining and stabilizing calcium and alkalinity for maximum growth of corals. Featuring a compact design and the use of quality material and workmanship, they are a much needed addition to any reef aquarium. After initial set up, these units start working almost instantly and require minimal maintenance.…
    $449.00  $381.65
  • CaribSea ARM Reactor Media - Extra Coarse

    CaribSea ARM Reactor Media - Extra Coarse

    A high magnesium reactor media. ARM™ Extra Coarse is a complete reactor media containing not only calcium and carbonate, but essential trace elements as well. This Extra Course version has the largest size granules and is the least likely to clog equipment resulting in lower maintenance.…
    $33.30
  • CO2 Regulator Kit

    CO2 Regulator Kit

    Great for dosing CO2 in a planted aquarium or for use with a calcium reactor. Includes flow regulator, needle valve, electronic solenoid & bubble counter. Unit comes with dual gauges each with dual reading of both psi & kg/cm. Left gauge meters tank capacity and right gauge meters flow. Needle valve flow control provides for precise measurement.…
    $149.99
  • Korallin 1502 Calcium Reactor [for aquariums up to 400 gallons]

    Korallin 1502 Calcium Reactor [for aquariums up to 400 gallons]

    The already best-selling Kalkreacktor (Calcium Reactor) in Germany has become even better. The new and improved Korallin kalkreaktor allows a simple, elegant and high efficiency production of calcium hydrogen carbonate including the necessary balanced carbonic acid. Sit back and watch your aquarium's pH and dKH being kept at optimum levels.…
    $584.54
  • Korallin 3002 Calcium Reactor/up to 800gal with Eheim 1048 Pump

    Korallin 3002 Calcium Reactor/up to 800gal with Eheim 1048 Pump

    The already best-selling Kalkreaktor (Calcium Reactor) in Germany has become even better. It completely replaces Kalkwasser, 1 or 2-part Calcium/Buffer powder and liquid dosing. The new and improved Korallin kalkreaktor allows a simple, elegant and high efficiency production of calcium hydrogen carbonate including the necessary balanced carbonic acid.…
    $696.81
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