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  2. Calcium reactor - Wikipedia

    en.wikipedia.org/wiki/Calcium_reactor

    A pH controller is recommended to control the CO2. It works by connecting to the CO2 regulator on the CO2 tank and measuring the pH of the solution inside the reactor via a pH probe. The controller will turn on and off the flow of CO2 based on the pH inside the reactor. The pH range for the typical calcium reactor is 6.5–6.8.

  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. CO2SYS - Wikipedia

    en.wikipedia.org/wiki/CO2SYS

    CO2SYS is a family of software programs that calculate chemical equilibria for aquatic inorganic carbon species and parameters. Their core function is to use any two of the four central inorganic carbon system parameters (pH, alkalinity, dissolved inorganic carbon, and partial pressure of carbon dioxide) to calculate various chemical properties of the system.

  5. Aquascaping - Wikipedia

    en.wikipedia.org/wiki/Aquascaping

    The Dutch aquarium employs a lush arrangement in which multiple types of plants having diverse leaf colors, sizes, and textures are displayed much as terrestrial plants are shown in a flower garden. This style was developed in the Netherlands starting in the 1930s, as freshwater aquarium equipment became commercially available. [1]

  6. Algae scrubber - Wikipedia

    en.wikipedia.org/wiki/Algae_scrubber

    In three editions of his book, Dynamic Aquaria, Dr Adey described his work in detail and discussed in scientific principles the physical, chemical, and biological considerations for building a functioning ecological system within an enclosure, from aquarium size, to microcosm (up to 5000 gallons), or mesocosm size (>5000 gallons). In describing ...

  7. Direct air capture - Wikipedia

    en.wikipedia.org/wiki/Direct_air_capture

    The physical scale of the air contactor in any DAC system is a formidable challenge and may also have an impact on the environment. A DAC system meant to combat six million metric tons of CO2 per year, may be sized at about 30 kilometers in length and 10 meters in height [37]