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In fishkeeping, a refugium is an appendage to a marine, brackish, or freshwater fish tank that shares the same water supply. It is a separate sump , connected to the main show tank. [ 1 ] It is a " refugium " in the sense that it permits organisms to be maintained that would not survive in the main system, whether food animals, anaerobic ...
Refugium (fishkeeping), a component of aquarium systems where algae may be grown; Protein skimmer, a form of mechanical filtration; Algaculture, the practice of cultivating algae and seaweed; Photobioreactor, a device that produces fuel using algae and light; Wikiversity:Algae scrubber, on how to build a DIY algae scrubber
The tables below present an example of an artificial seawater (35.00‰ of salinity) preparation devised by Kester, Duedall, Connors and Pytkowicz (1967). [1] The recipe consists of two lists of mineral salts, the first of anhydrous salts that can be weighed out, the second of hydrous salts that should be added to the artificial seawater as a solution.
Marine aquarists typically divide saltwater aquariums into those housing fish only, those housing fish with live rock, and those primarily designed to house corals and other invertebrates (also known as reef aquariums). Many fish hobbyists also divide the types of saltwater tanks based on the water temperatures at which they are kept. [5]
In addition, some sumps have a compartment that can be converted into a refugium, helping to filter out excess nutrients such as nitrates. A sump can also improve aeration of the water in the aquarium. Water movement between the sump and the display tank helps with gas exchange between the water and air.
A number of artificial "refugia" consisting of concrete tanks approximating conditions in Devils Hole were attempted to ensure the species' survival should the natural population at Devils Hole die out. The Hoover Dam Refugium for Endangered Desert Fish was established in August 1972, with the first twenty-seven pupfish translocated in October ...
Underwater concrete placement, by Tremie, skip, Pumped concrete, toggle bags, bagwork, usually to build foundations or coastal structures, and [6] grouted aggregate. [ 6 ] [ 7 ] Underwater rock blasting , or dredging of softer sediments, to clear an area of a navigational hazard, to excavate a canal or basin, or to prepare for foundations.
The extracted Lithium is then used to make ion batteries. [5] [3] Mines use them to separate ore from water. The ore can be sold for use in different industries. [3] Potash evaporation ponds are used to extract potassium from the mineral rich solution. The potassium extracted is used for products like fertilizer. [6]
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