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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. Industrial gas - Wikipedia

    en.wikipedia.org/wiki/Industrial_gas

    Retail sales of small scale gas supply are not confined to just the industrial gas companies or their agents. A wide variety of hand-carried small gas containers, which may be called cylinders, bottles, cartridges, capsules or canisters are available to supply LPG, butane, propane, carbon dioxide or nitrous oxide.

  4. Aquarium fish feed - Wikipedia

    en.wikipedia.org/wiki/Aquarium_fish_feed

    Dry food is a type of proprietary or artificially manufactured fish food consumed by a wide variety of tropical and saltwater fish and invertebrates.It is ideally suited to top dwellers and mid-water fish though numerous bottom dwelling species consume flake food once it has settled on the bottom.

  5. Coal gasification - Wikipedia

    en.wikipedia.org/wiki/Coal_gasification

    In industrial chemistry, coal gasification is the process of producing syngas—a mixture consisting primarily of carbon monoxide (CO), hydrogen (H 2), carbon dioxide (CO 2), methane (CH 4), and water vapour (H 2 O)—from coal and water, air and/or oxygen. Historically, coal was gasified to produce coal gas, also known as "town gas".

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