Rotala vietnam
Rotala vietnam, scientific name Rotala sp. Vietnam. The prefix “sp.” indicates that the species affiliation of this species has not yet been established. Perhaps this is one of the varieties of existing species. For example, in its underwater form, it is almost identical to Japanese Rotala (Rotala hippuris).
As it becomes clear from the name Rotala Vietnam comes from Southeast Asia. The first samples were collected from the territory of Vietnam by the employees of the Japanese nursery Rayon Vert, which later made it one of the most popular aquarium plants.
In favorable conditions, it has a predominantly vertical tendency to grow with the formation of numerous side shoots. Modified leaves resemble long needles or needles, but soft and tender.
Maintenance requires a certain amount of effort and experience from the aquarist. Healthy growth requires a regular supply of carbon dioxide, as well as maintaining a phosphate concentration of 1–2 mg/l, which thickens the stems, reduces internodal spacing, giving the plant a voluminous appearance. The concentration of iron and the level of light directly affect the color of the leaves. Intense light levels and iron-rich water promote red tones. In medium light and instead of red, green colors begin to dominate. Iron deficiency is a popular cause of Rotala’s death in Vietnam. The main symptom is pale leaves.
Propagation is similar to most other stem plants. The sprout can be cut off, the upper separated fragment immersed in the ground and soon, if the conditions are right, roots will appear from it.