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  2. Live rock - Wikipedia

    en.wikipedia.org/wiki/Live_rock

    Live rock is harvested for use in the aquarium from reefs, either from natural or human breakage. It may also be "seeded" from small coralline rocks by an aquaculturalist in warm ocean water, to be harvested later. Live rock can also be seeded by adding base rock to an active reef aquarium that already has live rock.

  3. Airstone - Wikipedia

    en.wikipedia.org/wiki/Airstone

    A spherical airstone at the Osaka Aquarium alongside a trio of red stingray pups, Hemitrygon akajei. An airstone, also called an aquarium bubbler, is a piece of aquarium furniture, traditionally a piece of limewood or porous stone, whose purpose is to gradually diffuse air into the tank, eliminating the noise and large bubbles of conventional air filtration systems, and providing other ...

  4. Filter feeder - Wikipedia

    en.wikipedia.org/wiki/Filter_feeder

    The basking shark is a passive filter feeder, filtering zooplankton, small fish, and invertebrates from up to 2,000 tons of water per hour. [6] Unlike the megamouth and whale sharks, the basking shark does not appear to actively seek its quarry; but it does possess large olfactory bulbs that may guide it in the

  5. Marine aquarium - Wikipedia

    en.wikipedia.org/wiki/Marine_aquarium

    A marine aquarium is an aquarium that keeps marine plants and animals in a contained environment. Marine aquaria are further subdivided by hobbyists into fish only (FO), fish only with live rock (FOWLR), and reef aquaria. Fish only tanks often showcase large or aggressive marine fish species and generally rely on mechanical and chemical filtration.

  6. Aquarium filter - Wikipedia

    en.wikipedia.org/wiki/Aquarium_filter

    Activated carbon and zeolites are also frequently added to aquarium filters. These highly porous materials act as adsorbates binding various chemicals to their large external surfaces [2] and also as sites of bacterial colonisation. The simplest type of aquarium filter consists only of filter wool and activated carbon.

  7. Underwater environment - Wikipedia

    en.wikipedia.org/wiki/Underwater_environment

    There is a smaller part of the surface covered by bodies of fresh water and a large volume of underground water in aquifers. The underwater environment is hostile to humans in many ways and therefore little explored. It can be mapped by sonar, or more directly explored via manned, remotely operated, or autonomous submersibles. The ocean floors ...

  8. List of rock types - Wikipedia

    en.wikipedia.org/wiki/List_of_rock_types

    Appinite – Type of igneous rock – A group of varieties of lamprophyre, mostly rich in hornblende; Aphanite – Igneous rock composed of very small crystals invisible to the naked eye; Borolanite – Variety of nepheline syenite from Loch Borralan, Scotland – A variety of nepheline syenite from Loch Borralan, Scotland

  9. Chalk - Wikipedia

    en.wikipedia.org/wiki/Chalk

    Chalk is a soft, white, porous, sedimentary carbonate rock.It is a form of limestone composed of the mineral calcite and originally formed deep under the sea by the compression of microscopic plankton that had settled to the sea floor.

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