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  2. 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. [10] 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 ...

  3. Vossia cuspidata - Wikipedia

    en.wikipedia.org/wiki/Vossia_cuspidata

    When the waters rise as the annual floods in the Kafue Flats commence, upon regular occasion large chucks of Vossia and Echinochloa stems detach, and these slowly dying clumps of grass become wind-blown floating mats in the swamps, which host their own unique ecosystem, dominated by the sedge Pycreus mundii, and further supporting the sedges ...

  4. Freshwater aquarium - Wikipedia

    en.wikipedia.org/wiki/Freshwater_aquarium

    A freshwater aquarium is a receptacle that holds one or more freshwater aquatic organisms for decorative, pet-keeping, or research purposes. Modern aquariums are most often made from transparent glass or acrylic glass. Typical inhabitants include fish, plants, amphibians, and invertebrates, such as snails and crustaceans. Tropical freshwater ...

  5. Fish farming - Wikipedia

    en.wikipedia.org/wiki/Fish_farming

    The vast majority of freshwater fish in the aquarium trade originate from farms in Eastern and Southern Asia, eastern Europe, Florida and South America that use either indoor tank systems or outdoor pond systems, while farming of fish for the marine aquarium trade happens at a much smaller scale. [7]

  6. Rummy-nose tetra - Wikipedia

    en.wikipedia.org/wiki/Rummy-nose_tetra

    The rummy-nose tetra (Petitella rhodostoma) is a species of tropical freshwater characin fish originating in South America, popular among fishkeepers as a tropical aquarium fish. [2] One of many small tetras belonging to the same genus, it is on average 5 cm (2 in) long when fully grown. [ 3 ]

  7. Brackish-water aquarium - Wikipedia

    en.wikipedia.org/wiki/Brackish-water_aquarium

    A brackish-water aquarium is an aquarium where the water is brackish (semi-salty). The range of "saltiness" varies greatly, from near freshwater to near marine and is often referred to as specific gravity (SG) or salinity. Brackish water aquaria is a popular specialization within the fishkeeping hobby.

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