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BBA may occur in both saltwater and freshwater aquaria. [16] Red spot algae may form a tenacious reddish-brown splotch or film on aquarium glass or plant leaves. It grows quickly and may be a symptom of high nitrates or iron. [17] These encrusting red algae may be referred to as a member of the genus Hildenbrandia. It is not especially common. [18]
The brown algae include the largest and fastest growing of seaweeds. [6] Fronds of Macrocystis may grow as much as 50 cm (20 in) per day, and the stipes can grow 6 cm (2.4 in) in a single day. [13] Growth in most brown algae occurs at the tips of structures as a result of divisions in a single apical cell or in a row of such
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.
These are the brown algae, [57] —some of which may reach 50 m in length [58] —the red algae, [59] and the green algae. [60] The most complex forms are found among the charophyte algae (see Charales and Charophyta ), in a lineage that eventually led to the higher land plants.
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.
The largest and most complex marine algae are called seaweeds. In contrast, the most complex freshwater forms are the Charophyta, a division of green algae which includes, for example, Spirogyra and stoneworts. Algae that are carried passively by water are plankton, specifically phytoplankton.