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Audouinella, also known as black algae, [1] is a widespread genus of red algae, found in marine and freshwater environments. [ 2 ] The form known as " black brush algae " (or " black beard algae ", BBA for short) is a particular nuisance in aquaria , since most algae eater fish and invertebrates avoid it.
However, total elimination of algae is considered unlikely in a hobby aquarium. Algae can be used as an bioindicator to inform an aquarist on water chemistry and other conditions. [2] Some species are intentionally cultivated within algae scrubbers. Few algae, such as marimo or red moss, are sought after for aquascaping in freshwater aquaria.
But in 2021, she explained, just after the state upped the ante on limitations for PFAS to 20 parts per trillion, samples from three wells showed levels slightly above the new standards: 21 parts ...
Swimming pool contaminants are introduced from environmental sources and swimmers. Affecting primarily outdoor swimming pools, environmental contaminants include windblown dirt and debris, incoming water from unsanitary sources, rain containing microscopic algae spores and droppings from birds possibly harboring disease-causing pathogens. [4]
After spring-tydes or great rigs of the sea, they fetch it in sacks on horse backes, and carie the same three, four, or five miles, and cast it on the lande, which doth very much better the ground for corn and grass. Today, algae are used by humans in many ways; for example, as fertilizers, soil conditioners, and livestock feed. [124]
Cyanobacteria (blue-green algae) bloom on Lake Erie (United States) in 2009. These kinds of algae can cause harmful algal bloom. A harmful algal bloom (HAB), or excessive algae growth, is an algal bloom that causes negative impacts to other organisms by production of natural algae-produced toxins, water deoxygenation, mechanical damage to other organisms, or by other means.