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  2. Berlin Method - Wikipedia

    en.wikipedia.org/wiki/Berlin_Method

    The Berlin Method of biological filtration is a method for maintaining a clean and stable environment within a saltwater aquarium, typically a coral reef system. This method relies on the use of ample live rock (rock with live marine organisms and bacteria on or in it).

  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. Live rock - Wikipedia

    en.wikipedia.org/wiki/Live_rock

    In J. Charles Delbeek's article Your First Reef Aquarium, [2] he states, The use of live rock immediately introduces into the aquarium numerous algae, bacteria and small invertebrates all of which contribute to the overall quality of the aquarium water. Live rock has just as much, if not more, surface area for bacteria than a trickle filter.

  5. 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

  6. Itacolumite - Wikipedia

    en.wikipedia.org/wiki/Itacolumite

    The stone is porous, and often yellow in color. It is also found in Kaliana village (Charkhi Dadri district, Haryana, India), [1] the U.S. state of Georgia, and Stokes and McDowell counties of North Carolina. It is the best and most widely known example of a flexible sandstone, and is a source of diamonds found in the Minas Gerais area of ...

  7. Pebble - Wikipedia

    en.wikipedia.org/wiki/Pebble

    Close view of pebbles [vague]. A pebble is a clast of rock with a particle size of 4–64 mm (0.16–2.52 in) based on the Udden-Wentworth scale of sedimentology.Pebbles are generally considered larger than granules (2–4 mm (0.079–0.157 in) in diameter) and smaller than cobbles (64–256 mm (2.5–10.1 in) in diameter).

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