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Algae Scrubber
An algae scrubber is a water filtering device which uses light to grow algae; in this process, undesirable chemicals are removed from the water. Algae scrubbers allow hobbyists to operate their saltwater or freshwater tanks or ponds using natural filtration based on primary production, much as occurs in oceans and lakes. Concepts An algae scrubber filters water by moving water rapidly over a rough, highly illuminated surface, which causes algae to start growing in large amounts. As the algae grow, they consume nutrients such as nitrate, phosphate, nitrite, ammonia, ammonium and even metals such as copper from the water. These nutrients are normally a problem in aquariums and ponds because they cause nuisance algae to grow, and also because they cause sickness and/or other problems in aquarium fish, invertebrates and corals. An algae scrubber allows algae to grow, but the algae grow inside the filter instead of in the aquarium or pond. This removes excess nutrients (scrubs th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Modern Floating Surface Algae Scrubber Filter, Floating On Top Of Aquarium
Modern may refer to: History *Modern history ** Early Modern period ** Modern age, Late Modern period *** 18th century *** 19th century *** 20th century ** Contemporary history * Moderns, a faction of Freemasonry that existed in the 18th century Philosophy and sociology * Modernity, a loosely defined concept delineating a number of societal, economic and ideological features that contrast with "pre-modern" times or societies ** Late modernity Art * Modernism ** Modernist poetry * Modern art, a form of art * Modern dance, a dance form developed in the early 20th century * Modern architecture, a broad movement and period in architectural history ** Moderne, multiple architectural styles ** Modernisme a.k.a. Catalan Modernism * Modern music (other) Geography *Modra, a Slovak city, referred to in the German language as "Modern" Typography * Modern (typeface), a raster font packaged with Windows XP * Another name for the typeface classification known as Didone (typography) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Valonia (alga)
''Valonia'' (C. Agardh, 1823) is a genus of green algae in the Valoniaceae family. The genus ''Ventricaria'' is now regarded as a synonym of ''Valonia''. Taxonomy and nomenclature The genus ''Valonia'' belongs to the order Cladophorales and family Valoniaceae. It comprises several taxonomically acceptable species based from available data and literatures. Below is a list of common species of ''Valonia'' found throughout the tropics: *''Valonia fastigiata'' Harvey ex J. Agardh 1823 *'' Valonia ventricosa'' J.Agardh 1887 *''Valonia utricularis'' (Roth) Agardh 1823 *''Valonia aegagropila'' C. Agardh 1823 *''Valonia macrophysa'' Kützing 1843 *''Valonia ovalis'' C.Agardh 1822 *''Valonia chlorocladus'' Hauck 1886 *''Valonia cespitula'' Zanardini ex Kützing *''Valonia pachynema'' (G. Martens) Børgesen *''Valonia barbadensis'' W.R.Taylor, 1969 *''Valonia nutrix'' (Kraft & A.J.K.Millar) Kraft, 2007 *''Valonia oblongata'' J.Agardh, 1887 *''Valonia trabeculata'' Egerod, 1952 Gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knitting
Knitting is a method for production of textile Knitted fabric, fabrics by interlacing yarn loops with loops of the same or other yarns. It is used to create many types of garments. Knitting may be done Hand knitting, by hand or Knitting machine, by machine. Knitting creates Stitch (textile arts), stitches: loops of yarn in a row; they can be either on straight flat needles or in ''the round'' on needles with (often times plastic) tubes connected to both ends of the Knitting needle, needles. There are usually many ''active stitches'' on the knitting needle at one time. Knitted fabric consists of a number of consecutive rows of connected loops that intermesh with the next and previous rows. As each row is formed, each newly created loop is pulled through one or more loops from the prior row and placed on the ''gaining needle so'' that the loops from the prior row can be pulled off the other needle without unraveling. Differences in yarn (varying in fibre type, Yarn weight, ''w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gravity
In physics, gravity (), also known as gravitation or a gravitational interaction, is a fundamental interaction, a mutual attraction between all massive particles. On Earth, gravity takes a slightly different meaning: the observed force between objects and the Earth. This force is dominated by the combined gravitational interactions of particles but also includes effect of the Earth's rotation. Gravity gives weight to physical objects and is essential to understanding the mechanisms responsible for surface water waves and lunar tides. Gravity also has many important biological functions, helping to guide the growth of plants through the process of gravitropism and influencing the circulation of fluids in multicellular organisms. The gravitational attraction between primordial hydrogen and clumps of dark matter in the early universe caused the hydrogen gas to coalesce, eventually condensing and fusing to form stars. At larger scales this results in galaxies and clust ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Walter H
Walter may refer to: People and fictional characters * Walter (name), including a list of people and fictional and mythical characters with the given name or surname * Little Walter, American blues harmonica player Marion Walter Jacobs (1930–1968) * Gunther (wrestler), Austrian professional wrestler and trainer Walter Hahn (born 1987), who previously wrestled as "Walter" * Walter, standard author abbreviation for Thomas Walter (botanist) ( – 1789) * "Agent Walter", an early codename of Josip Broz Tito * Walter, pseudonym of the anonymous writer of '' My Secret Life'' * Walter Plinge, British theatre pseudonym used when the original actor's name is unknown or not wished to be included * John Walter (businessman), Canadian business entrepreneur Companies * American Chocolate, later called Walter, an American automobile manufactured from 1902 to 1906 * Walter Energy, a metallurgical coal producer for the global steel industry * Walter Aircraft Engines, Czech manufacturer of aero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aiptasia
''Aiptasia'' is a genus of a symbiotic cnidarian belonging to the subphylum Anthozoa (sea anemones, corals). ''Aiptasia'' is a widely distributed genus of temperate and tropical sea anemones of benthic lifestyle typically found living on mangrove roots and hard substrates. These anemones, as well as many other cnidarian species, often contain symbiotic dinoflagellate unicellular algae of the genus '' Symbiodinium'' living inside nutritive cells. The symbionts provide food mainly in the form of lipids and sugars produced from photosynthesis to the host while the hosts provides inorganic nutrients and a constant and protective environment to the algae. Species of ''Aiptasia'' are relatively weedy anemones able to withstand a relatively wide range of salinities and other water quality conditions. In the case of ''A. pallida'' and ''A. pulchella'', their hardiness coupled with their ability to reproduce very quickly and out-compete other species in culture gives these anemones the sta ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinoflagellate
The Dinoflagellates (), also called Dinophytes, are a monophyletic group of single-celled eukaryotes constituting the phylum Dinoflagellata and are usually considered protists. Dinoflagellates are mostly marine plankton, but they are also common in freshwater habitats. Their populations vary with sea surface temperature, salinity, and depth. Many dinoflagellates are photosynthetic, but a large fraction of these are in fact mixotrophic, combining photosynthesis with ingestion of prey ( phagotrophy and myzocytosis). In terms of number of species, dinoflagellates are one of the largest groups of marine eukaryotes, although substantially smaller than diatoms. Some species are endosymbionts of marine animals and play an important part in the biology of coral reefs. Other dinoflagellates are unpigmented predators on other protozoa, and a few forms are parasitic (for example, '' Oodinium'' and '' Pfiesteria''). Some dinoflagellates produce resting stages, called dinoflagellate cys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Yellow-green Algae
Yellow-green algae or the Xanthophyceae (xanthophytes) are an important group of heterokont algae. Most live in fresh water, but some are found in marine and soil habitats. They vary from single-celled flagellates to simple colonial and filamentous forms. Xanthophyte chloroplasts contain the photosynthetic pigments chlorophyll ''a'', chlorophyll ''c'', β-carotene, and the carotenoid diadinoxanthin. Unlike other Stramenopiles (heterokonts), their chloroplasts do not contain fucoxanthin, which accounts for their lighter colour. Their storage polysaccharide is chrysolaminarin. Xanthophyte cell walls are produced of cellulose and hemicellulose. They appear to be the closest relatives of the brown algae. Classifications The species now placed in the Xanthophyceae were formerly included in the Chlorophyceae. In 1899, Lüther created the group Heterokontae for green algae with unequal flagella. Pascher (1914) included the Heterokontae in the Chrysophyta. In 1930, Allorge renamed t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
