Azolla Carolina (Azolla caroliniana)
Caroline azolla is also called an aquatic fern, which belongs to the order of azollaceae. Today, azole has adapted to various climatic conditions, and has appeared in other European countries.
In most cases, aquatic fern grows floating on the surface, and only occasionally can become fixed in the ground. The maximum length of one shoot is no more than 2.5 cm. It has a horizontal stem on which small paired leaves in a tiled shape are located. Experienced aquarists like to plant these beautiful green islands in their aquariums, and all because beginners may have difficulty growing the Korolinsky azolla. This plant requires careful care and has a seasonal dependence, and in the winter period stops its growth.
The leaves have upper and lower lobes, the lower part is thinner and absorbs micronutrients from water, and the upper one is located above the surface of the water and is responsible for the synthesis process. In the summer, the leaves have a bright green color, and in winter they acquire a brown hue. The leaves are very small, the width is not more than 1 mm, and is long up to 1.5 mm.
Aquatic fern is able to absorb nutrients completely throughout the surface. Floating azolla strives to take possession of all the free space as soon as possible, so it must be regularly planted. Some aquarists plant the Caroline azolla as a shade.
Maintenance and care
A plant in nature prefers to grow in stagnant water bodies, in muddy metas. Azole can grow and cover the surface of the water with a dense layer, in nature its thickness can reach up to 8 cm.
For breeding in aquarium conditions, the water should not be acidic, the optimum pH should not exceed 7, and the hardness should not exceed 100. For full growth, the plant needs good lighting, while daylight hours should be from 10 to 12 hours. Water fern needs both natural sunlight and artificial.
Azolla feels comfortable with various temperature fluctuations from 18 to 30 0C. But if the water temperature drops below 18, then the plant will stop developing, begin to decay, and will soon die. In winter, azole falls asleep and does not grow, but in spring, new plants will begin to form from old spores.
Water fern propagates quite simply by dividing the spores. To do this, you need to separate a few leaves from an adult plant and settle in a new place with good lighting, and soon the azolla will begin to grow. You can also try to plant in the ground, slightly deepening, but takes root in the ground is quite difficult. To accelerate the process of growth of water fern, it must be pierced with a needle in several places, and then new processes will appear in the puncture sites.
This variety of azolla is often planted in an aquarium in which labyrinth fish live (cockerels, laliuses, etc.). For such fish, this green planting serves as material for building nests. Azolla can also be planted in an aquarium with pregnant viviparous females, the born fry will be able to hide in the shadow of this plant.
In winter, with a lack of lighting, Azolla Korolinskaya will begin to die. Therefore, to avoid this, you need to maintain a comfortable temperature and lighting. There is another way to preserve the Korolinskaya azolla, for this you will need raw moss, for example sphagnum, and water fern for wintering is placed in it. But the ambient temperature should not be higher than 12 0C. After the arrival of spring, the plant can again be moved to the aquarium.