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  2. Rummy-nose tetra - Wikipedia

    en.wikipedia.org/wiki/Rummy-nose_tetra

    The fish is interesting in that it can act as a "mine canary" in an aquarium, alerting the aquarist to potential pollution problems in an aquarium. When levels of certain metabolic wastes (ammonia, nitrites and nitrates) exceed critical levels, the intense ruby-red colour of the fish's facial area becomes pale.

  3. List of brackish aquarium fish species - Wikipedia

    en.wikipedia.org/wiki/List_of_brackish_aquarium...

    Often sold as freshwater fish, but this species actually thrives in brackish water. As the fish matures, it requires the salinity levels to slowly increase with age. Must be kept in aquarium with very low Nitrite and Nitrate levels to be kept successfully. A highly varied diet is a necessary requirement for this species. Prawns, muscle meat ...

  4. Fishkeeping - Wikipedia

    en.wikipedia.org/wiki/Hardy_fish

    An aquascaped freshwater aquarium. Fishkeeping is a popular hobby, practiced by aquarists, concerned with keeping fish in a home aquarium or garden pond.It is a practice that encompasses the art of maintaining one's own aquatic ecosystem, featuring a lot of variety with various water systems, all of which have their own unique features and requirements.

  5. Community aquarium - Wikipedia

    en.wikipedia.org/wiki/Community_aquarium

    While a few freshwater and marine fish can adapt to brackish water, most cannot. The most deadly chemical in aquarium water is ammonia, produced from fish excretions. It is important to test for ammonia, since it is a chemical precursor of nitrites and nitrates, also harmful to fish.

  6. sera (company) - Wikipedia

    en.wikipedia.org/wiki/Sera_(company)

    During the 1980s, Sera continued to broaden its offering with new lines of foods, vitamins, and technological products. Notably, the era featured the launch of the Sera Bio-Denitrator, the first device designed to biologically reduce nitrate levels in aquariums. [4] Sera products are sold in more than 80 countries. [citation needed] [5]

  7. 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.

  8. Ammonia poisoning - Wikipedia

    en.wikipedia.org/wiki/Ammonia_poisoning

    Schematic representation of the flow of Nitrogen through a common aquarium. Ammonia poisoning is a common fish disease in new aquariums, especially when immediately stocked to full capacity. Ideally, the level of ammonia (NH 3) and ammonium compounds (i.e. those containing NH 4 +) in fish tanks should be zero.

  9. Aquarium filter - Wikipedia

    en.wikipedia.org/wiki/Aquarium_filter

    Aquariums are usually much more densely stocked with fish than the natural environment. This increases the amount of ammonia produced in the relatively small volume of the aquarium. The bacteria responsible for breaking down the ammonia by converting it to nitrite, Nitrosomonas , colonize the surface of any objects inside the aquarium.

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