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  2. Calcium reactor - Wikipedia

    en.wikipedia.org/wiki/Calcium_reactor

    Saltwater may have a pH of 7.8 or higher, so to reduce the pH carbon dioxide (CO 2) is used. The reaction formula is: CaCO 3 + H 2 O + CO 2 Ca 2+ + 2 HCO 3 −. Inside the reaction chamber, a calcium rich media , mainly CaCO 3, is forced into contact with water injected with carbon dioxide (CO 2) in order to create carbonic acid (H 2 CO 3).

  3. Ocean acidification - Wikipedia

    en.wikipedia.org/wiki/Ocean_acidification

    In an experimental aquarium facility, clownfish were sustained in non-manipulated seawater with pH 8.15 ± 0.07, which is similar to our current ocean's pH. [115] To test for effects of different pH levels, the seawater was modified to two other pH levels, which corresponded with climate change models that predict future atmospheric CO 2 levels ...

  4. Recirculating aquaculture system - Wikipedia

    en.wikipedia.org/wiki/Recirculating_aquaculture...

    Keeping the pH in a suitable range (5.0-9.0 for freshwater systems) is crucial to maintain the health of both the fish and biofilter. pH is typically controlled by the addition of alkalinity in the form of lime (CaCO 3) or sodium hydroxide (NaOH). A low pH will lead to high levels of dissolved carbon dioxide (CO 2), which can prove toxic to fish.

  5. Aquarium - Wikipedia

    en.wikipedia.org/wiki/Aquarium

    Water conditioners formulated to remove chlorine or chloramine are often all that is needed to make the water ready for aquarium use. Brackish or saltwater aquaria require the addition of a commercially available mixture of salts and other minerals. This aquarium features a heated tank and a glass-enclosed top for warmth during winter.

  6. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    Solutions with a pH of 7 at 25 °C are neutral (i.e. have the same concentration of H + ions as OH − ions, i.e. the same as pure water). The neutral value of the pH depends on the temperature and is lower than 7 if the temperature increases above 25 °C.

  7. Buffer solution - Wikipedia

    en.wikipedia.org/wiki/Buffer_solution

    A buffer solution is a solution where the pH does not change significantly on dilution or if an acid or base is added at constant temperature. [1] Its pH changes very little when a small amount of strong acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical ...

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