Giant valisneria (Vallisneria gigantea) – aquarium plant of the Vodokrasovye family (Hydrocharit? Ceae).
Natural distribution area Giant valisneria – Islands of Southeast Asia.
Giant valisneria – a large enough plant with linear, stemless leaves, whose width is about 4 centimeters, and the length reaches 1 meter. The color of the leaves is bright and dark green.
Even being in big aquarium, leaves of valisneria float on the surface of the water.
In the content giant wallisneria also not whimsical, like all members of this family. It grows evenly throughout the year. For her content fit tropical aquarium, with a water temperature of 20-26 ° C.
Reducing the temperature is not recommended. It is best suited to water with a pH of 6-7 total hardness not higher than 8 °. Water change is not required, as the plant grows equally well in both old and fresh water.
Lighting need intense and bright. Because giant vallyseria – a plant whose upper leaves darken the lower layers aquarium, It is desirable to provide the aquarium with additional side illumination.
The length of daylight hours is at least 12 hours. Good gravel of any size can be used as a soil.
In the new soil is recommended to add a little clay. The soil thickness must be at least 7 cm. – then the root system of the vallisneria will develop properly.
Mineral dressing for Vallisneria is not required. Vallisneria are usually planted with a group in the corner of the aquarium, in the middle or in the background.
Aquarium plant is not very well tolerate the minerals contained in the water. Salt and baking soda should be added to the aquarium with caution – an excess of sodium in the water can lead to impaired growth.
Giant valisneria propagates vegetatively, layings are formed on a creeping shoot. When a 3-4 leaf grows on a newly formed daughter plant, it can be separated along with the lobe of the roots. Breeding seeds vallisneria gigantic in artificial conditions it is very complicated by the fact that this plant belongs to dioecious – the flowers that form on the same plant have the same sex.
Even if plants of different sexes “live” in an aquarium, it’s not a fact that they will coincide during flowering periods. Therefore, for breeding vallisneria in the aquarium contain several heterogeneous plants.