Spiral valisneria (Vallisneria spiralis) – aquarium plant family vodokrasovye (Hydrocharitaceae).
In natureSpiral valisneria grows in the tropics and subtropics. In Russia Vallisneria occurs in Central Asian waters, as well as in the water expanses of the basins of the Volga, Don, Dnieper and Kuban.
Spiral valisneria is quite popular type of aquarium plants. Spiral valisneria has a ribbon-like leaves of rich green color, which grow, reach the surface of the water surface. Leaves of Vallisneria are twisted in a spiral.
If the plant survives well, its leaves can reach a length of 70-80 centimeters. Although statistics indicate a plant length of 50 centimeters.
AT aquarium Wallisneria takes place in the background or near the side walls.
Simplicity Vallisneria spiral, the simplicity of its reproduction and the ability to grow throughout the year make it one of the favorite plants, even among beginner aquarists. The optimum water temperature for keeping vallisneria spiral is 20-28 ° C in tropical or moderately warm aquariums. If the water is cooler than the indicated range, plant growth slows down.
In addition, the growth of the plant is affected by water hardness, the optimal indicator of which is considered to be 8 °, while the pH should not exceed 5-7. Spiral valisneria requires regular water changes, moderate or bright lighting.
In case of insufficient light, the valisneria is drawn out, the leaves turn yellowish. As a source lighting Both natural and artificial light can be used, and fluorescent lamps or incandescent lamps can be used as a similar light source. Duration of daylight hours from 8 to 16 hours.
The plant is recommended to be planted in a nutrient, well-silted soil. Additional feeding Spiral valisneria does not require.
Since the root system of the plant is very delicate, therefore it is better to use river sand as the soil.
Get in your aquarium thick dawn Vallisneria spiral There is no difficulty, as it multiplies very quickly with the help of daughter root processes. Every year Vallisneria is able to produce up to several dozen subsidiary shoots. In addition, vallisneria can bloom, but flowering is not accompanied by the formation of seeds due to same-sex flowers.
Under natural conditions, both male and female inflorescences can be found. Therefore, valisneria breeds well in the natural environment also with the help of seeds.