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  2. Calcium reactor - Wikipedia

    en.wikipedia.org/wiki/Calcium_reactor

    If the probe detects a low pH level, the pump activates. The bubbles raise the pH by dissipating the CO 2 gas. Since the pH inside the reactor is much lower than the pH in the aquarium, you run the risk of lowering the aquarium pH by running a calcium reactor if that low pH isn't mitigated.

  3. Recirculating aquaculture system - Wikipedia

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

    The first step of nitrification in the biofilter consumes alkalinity and lowers the pH of the system. [11] 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 ...

  4. Aquarium - Wikipedia

    en.wikipedia.org/wiki/Aquarium

    This aquarium features a heated tank and a glass-enclosed top for warmth during winter. Some aquarists modify water's alkalinity, hardness, or dissolved content of organics and gases, before adding it to their aquaria. This can be accomplished by additives, such as sodium bicarbonate, to raise pH. [69]

  5. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [2] The pH scale is traceable to a set of standard solutions whose pH is established by international agreement. [3]

  6. Brackish-water aquarium - Wikipedia

    en.wikipedia.org/wiki/Brackish-water_aquarium

    The tank sizes can vary widely depending on the needs of the particular species, and the temperature is usually in the tropical range of 76-82 °F. The substrate can vary from sand to gravel, but many aquarists choose crushed coral or aragonite sand, both of which help raise the hardness and pH to an acceptable level. Many brackish water fish ...

  7. Refugium (fishkeeping) - Wikipedia

    en.wikipedia.org/wiki/Refugium_(fishkeeping)

    Some also use refugiums to raise tiny brine shrimp, mysis shrimp, ostracods, amphipods, copepods and isopods for delicate fish like seahorses and dragonets to feed on. [2] A sump is an additional tank often kept under the display tank that serves to house filtration and other miscellaneous equipment such as protein skimmers, reaction chambers ...