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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".
Gutweed or Tube algae is common in both tropical and temperate waters. The algae forms tube-like blades secured by a single holdfast to hard surfaces and Mangrove roots. In the aquarium, this algae should be kept in water temperatures under 80 °F (26.7 °C) and may be used to feed herbivorous fish.
Algae may be cultivated for the purposes of biomass production (as in a seaweed cultivator), wastewater treatment, CO 2 fixation, or aquarium/pond filtration in the form of an algae scrubber. [116] Algae bioreactors vary widely in design, falling broadly into two categories: open reactors and enclosed reactors.
Most algae in hobby aquaria are unwanted, nuisance plants. Few algae, such as marimo ( Aegagropila linnaei ), are sought after and intentionally cultivated in freshwater aquaria. False aquatics or pseudo-aquarium plants
Caloglossa beccarii is one of the few species of algae that is used in freshwater aquascaping.Although it has been known to European aquarists since the 1990s, it wasn't identified until a 2004 assessment by Maike Lorenz, professor at the University of Goettingen.
Green algae are often classified with their embryophyte descendants in the green plant clade Viridiplantae (or Chlorobionta). Viridiplantae, together with red algae and glaucophyte algae, form the supergroup Primoplantae, also known as Archaeplastida or Plantae sensu lato. The ancestral green alga was a unicellular flagellate. [20]
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