Fern thailand (Microsorum pteropus) or, as it is called, Pterygoid fern – Polypodiaceae (Polypodiaceae) aquarium plant.
Habitat thai fern – Southeast Asia. In natural conditions, the plant reaches a height of half a meter.
Bright green lanceolate leaves pterygoid fern arranged alternately on a long rhizome. In conditions aquarium the plant reaches a height of 25-30 cm, forming at the same time dense thickets.
For content of thai fern will fit aquarium any size, place it at the side walls around the perimeter or in the middle aquarium. During the year it grows evenly.
Although the special requirements for content not presented, yet some features are present.
Feels comfortable Thai fern in tropical aquarium with a water temperature of 24 ° C. Even under optimal conditions it grows slowly. And at a temperature below the specified growth almost stops.
According to the parameters of the reaction and the hardness of water can be any pterygoid fern it doesn’t matter. However, mildly acidic or neutral water with a hardness not higher than 6 ° will be optimal.
These conditions are usually formed in the old water, and therefore it is not recommended to make frequent changes of it. The easiest way for a plant is to transfer 1 / 5-1 / 6 parts of the total water volume. aquarium no more than once or twice a month.
For content of thai fern lighting need moderate or strong. Withstands shading for a long time, but its growth is impaired.
Of course, the most favorable is the natural diffused light. Sources of artificial lighting can be both incandescent lamps and fluorescent lamps, the power of which is individually selected for each aquarium taking into account the needs of neighboring plants. Light day should be at least 12 hours.
Rhizome pterygoid fern poorly developed and, as a rule, located above the ground. Therefore, the nature of the substrate, as well as its presence, does not matter at all.
For such a root system, there is quite enough sludge that has accumulated at the bottom aquarium. To improve growth performance fern It is recommended periodically, about 1-2 times a month, to make a mineral fertilizer. Special attention should also be paid to the addition of nitrogen fertilizers and trace elements, the doses of which should be minimized.
Of the number of nitrogen fertilizers, urea is the most suitable, adding 1-2 granules per 100 liters of water two or three times a week. Plant tolerates anxiety.
In conditions aquarium Thai fern reproduces only by vegetative means. The rhizome is divided into several parts with two or three leaves. From each such part, then a young plant is formed.
The second vegetative breeding method is the formation of growth buds on decaying old leaves, from which a new plant subsequently develops. After the final destruction of the old leaf, young plants float to the surface.
This plant gradually develops rhizome, under the weight of which the plant sinks to the bottom of the aquarium.