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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. Limestone - Wikipedia

   en.wikipedia.org/wiki/Limestone

   Limestone was also a very popular building block in the Middle Ages in the areas where it occurred, since it is hard, durable, and commonly occurs in easily accessible surface exposures. Many medieval churches and castles in Europe are made of limestone. Beer stone was a popular kind of limestone for medieval buildings in southern England. [109]

5. Dolomite (rock) - Wikipedia

   en.wikipedia.org/wiki/Dolomite_(rock)

   Dolomite (also known as dolomite rock, dolostone or dolomitic rock) is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO 3) 2. It occurs widely, often in association with limestone and evaporites , though it is less abundant than limestone and rare in Cenozoic rock beds (beds less than about 66 ...

6. Category:Limestone - Wikipedia

   en.wikipedia.org/wiki/Category:Limestone

   Limestone is a geological rock formed primarily from calcium carbonate and in water. It is produced principally during periods when there is a high proportion of carbon dioxide in the atmosphere . It varies greatly in its hardness and in the materials included in it so its commercial uses vary.

7. Coralline rock - Wikipedia

   en.wikipedia.org/wiki/Coralline_rock

   Coralline rock is a type of rock formed by the death of layers of coralline algae.It is visually quite bright like the algae, and is often desired as aquarium decoration. . Since it is formed from the dead algae, it contains some nutrients and calcium carbonate, which has allowed it to be used in some building structu