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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). The theory is that aerobic bacteria covering the surface of ...
Recirculating aquaculture system. Recirculating aquaculture systems (RAS) are used in home aquaria and for fish production where water exchange is limited and the use of biofiltration is required to reduce ammonia toxicity. [ 1 ] Other types of filtration and environmental control are often also necessary to maintain clean water and provide a ...
Blue green algae growing on the substrate of a fresh water aquarium. Although colloquially called algae, blue-green algae(BGA) is a type of cyanobacteria. It can present with several different colors. While there are many BGA species, the most common type found in aquaria is referred to as "slime algae".
The Georgia Aquarium. Fish capacity is a function of aquarium size. Limiting factors include the availability of oxygen in the water and the rate at which the filter can process waste. Aquarists apply rules of thumb estimating appropriate population size; the examples below are for small freshwater fish.
Among wildlife, amphibians (tadpoles) and freshwater fish eggs are most sensitive to elevated nitrate levels, and experience growth and developmental damage at levels commonly found in U.S. freshwater bodies (<20mg/l); while freshwater invertebrates are more tolerant (~90+mg/l) and adult freshwater fish can tolerate very high levels (800mg+/l ...
Aqua regia (/ ˈreɪɡiə, ˈriːdʒiə /; from Latin, "regal water" or "royal water") is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. [ b ] Aqua regia is a fuming liquid. Freshly prepared aqua regia is colorless, but it turns yellow, orange or red within seconds from the formation of nitrosyl chloride and ...
e. Eutrophication is a general term describing a process in which nutrients accumulate in a body of water, resulting in an increased growth of microorganisms that may deplete the water of oxygen. [1][2] Eutrophication may occur naturally or as a result of human actions. Manmade, or cultural, eutrophication occurs when sewage, industrial ...
Elevated nitrate in groundwater is a concern for drinking water use because nitrate can interfere with blood-oxygen levels in infants and cause methemoglobinemia or blue-baby syndrome. [28] Where groundwater recharges stream flow, nitrate-enriched groundwater can contribute to eutrophication , a process that leads to high algal population and ...
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