
Chara vulgaris
Characeae

Characeae
Seen in the wild in Albania, Algeria, Argentina, Armenia, Australia, Austria, Belgium, Bosnia & Herzegovina, and 37 more countries.
Chara vulgaris, also called the common stonewort, is a species of charophyte green alga. It is one of the most widespread species of the genus Chara and occurs across much of Europe, Asia, Africa, North America, and Australia. The thallus of Chara vulgaris is macroscopic and highly organized, consisting of a main axis differentiated into nodes and elongated internodes. At each node, a whorl of branchlets is produced. The organism is anchored to the substrate by rhizoids. The species is relatively polymorphic in its organization. The species is of ecological importance in aquatic environments. It is particularly common in alkaline waters rich in calcium bicarbonate (CaCO3) and can tolerate moderate eutrophication, although dense populations are often associated with relatively clear water conditions.
Soft, acidic water, subdued light, sand, roots and fallen leaves: how to set up a biotope aquarium from the Amazon and the rivers around it.
Hard, alkaline water, sand and rock: an aquarium from the rivers and lakes of Mexico and Central America, with cichlids and livebearers.
Two completely different aquariums: forest rivers with soft, brown water, roots and leaves, and Rift Valley lake cichlids in hard, alkaline water with big rock piles.
Two aquariums from Southeast Asia: calm forest streams and peat swamps with soft, brown water, and fast mountain streams with cool, oxygen-rich water.