If you are looking for a beautiful and very useful plant for your aquarium, be sure to take a look at the Indian fern. Its delicate, openwork foliage of a light green color immediately attracts attention and creates a feeling of lightness and space in the underwater world.
But its beauty is only half the story. This plant is a real workhorse, a natural filter for your water. It actively absorbs substances harmful to fish, such as nitrates, from the water, making the habitat healthier and cleaner.
What is especially nice is that Indian fern is quite unpretentious. It grows well in moderate light and does not require complex care. It is an excellent choice for both experienced aquarists and beginners who want to combine aesthetics with practicality.
Distribution
In its natural environment, Ceratopteris thalictroides grows in Southeast Asia, South and Central America, and is also found in Australia. It prefers shallow water bodies with a large amount of silt. It can grow above water on moist soil or completely underwater.
The Indian fern was discovered about nine years ago. After the plant was imported to Europe, it became very popular among aquarists. This is mainly due to the fact that it can live for a long time in artificial conditions, although in its native habitat it is considered an annual plant.
Indian fern is not only a beautiful plant with graceful, delicate foliage, but also a true natural air purifier. It fits easily into any interior, thrives in home conditions, and actively absorbs harmful impurities, making the air cleaner and more pleasant to breathe. If you want to add a little greenery to your home without the hassle of maintenance, this is an excellent choice.
Growing and care
The Indian fern is quite undemanding, so aquarists of any experience level can acquire this decorative tropical plant.
Ceratopteris thalictroides is recommended to be kept in a warm, preferably tropical aquarium, as close as possible to its natural habitat.
Since Indian fern grows quite tall in aquarium conditions, it is best to plant it in medium or large containers.
It is recommended to place the bush closer to the center of the aquarium. The plant absorbs nutrients mainly from the water, purifying it at the same time. As a result, the liquid in the aquarium will almost always be very clean.
Water parameters for ideal maintenance
Ceratopteris thalictroides prefers stagnant water in old reservoirs in its natural environment. Therefore, it is best to plant it in an “old” aquarium with an established ecosystem. When keeping this plant, frequent water changes are not required. The filter should not create too strong a current in the aquarium.
It is recommended to maintain the following water parameters in the aquarium:
- acid-alkaline balance — 5-6.5.
In general, the plant prefers water with low or medium hardness and a neutral acidity level. A slightly acidic environment is also acceptable. Water that is too hard with a pronounced alkaline reaction is detrimental to the fern.
Lighting requirements
This tropical plant requires a lot of light. The minimum power of the lamps should be 0.5 W/l. If necessary, it easily tolerates shading, but it is better not to deprive it of light for a long time to avoid stunting its growth.
Unlike many aquarium plants, Indian fern cannot be placed in direct natural sunlight, otherwise the leaves will get burned. However, diffused light is acceptable.
When setting up artificial lighting, aquarists recommend installing fluorescent lamps that can generate light rays in the same spectrum as sunlight. The recommended length of daylight hours is 12 hours.
Requirements for soil and nutrient substrate
Since Indian fern gets most of its nutrients from the water, the substrate requirements are not very strict. When choosing soil, it is important that it has sufficiently fine granules.
Substrate with particles that are too large can damage the roots. The optimal size for the granules is comparable to sand. On average, the soil layer should be about 5 cm thick.
The nutrient content of the substrate is not important for Indian fern. On the contrary, soil that is too “rich” will only make the situation worse.
To prevent an excess of minerals, you can use Tetra ActiveSubstrate soil. Its distinctive feature is the ability of the granules to absorb excess trace elements from the water and release them back when necessary.
Plus, the porous granules make it easier for thin roots to take hold.
Fertilizer requirements
Although the fern's root system is well developed, it is preferable to use liquid fertilizers rather than tablets. This is because the plant has very delicate and fragile roots.
Indian fern obtains most of its nutrients from the silt accumulated at the bottom. Excess minerals in the water are unacceptable. The plant is very sensitive to them, and excessive feeding can lead not to growth, but to the death of Ceratopteris.
As a preventive measure against chlorosis, it may be necessary to apply fertilizer with a high iron content. In this case, the following fertilizers are suitable:
Reproduction
Ceratopteris thalictroides can be propagated vegetatively by dividing the mother bush into parts. To do this, each part must have formed roots and several leaves. If desired, the separated sections can be left to float on the surface. Alternatively, bury the lower part in the soil, where the plant will quickly take root on its own.
Indian fern is also capable of reproducing with the help of sporangia. Daughter plants form on the old leaves of the parent bush. The lower fertile leaf plates with sporangia serve as a “platform” for the development of young ferns. Over time, new bushes separate and float to the surface of the water, where they continue to develop.
Variations and forms of the plant
There are several popular types of ferns besides Indian fern. It is noteworthy that all these representatives have very similar requirements for growing conditions.
- Winged fern. It is common in Central and South America. It is also known by the unofficial name “water cabbage.” It grows in stagnant or slow-flowing water bodies and reaches 0.3-0.4 m in height. In an aquarium, it can exist as a floating plant, and it is permissible to fix it in the substrate. It can be a good refuge for fry. It is a biofilter and helps stabilize the aquarium ecosystem. Bushes floating on the water surface can be used to scatter light.
- Thai. This fern is distinguished by its long, lanceolate leaves. The leaf blade is wrinkled, dark green in color, and averages 15-30 cm in length. The Thai fern has a long, creeping rhizome.
- Lace. It got its name from the decorative shape of its leaves — the fern leaf plate is elongated, with a large number of incisions. The plant is commonly found in Sri Lanka and Indonesian water bodies. Aquarists appreciate it for its fast growth rate, which allows you to quickly achieve lush green growth. The bush can reach a height of 15-40 cm.
- Bolbitis. This type of fern is best placed in the foreground of the aquarium, as unlike its relatives, it grows sideways rather than upwards. The leaves of the plant are dark green in color and have a complex pinnate structure, arranged one after the other in the bush. Another name for this fern is shield fern. Thanks to its rhizoid roots, it can attach itself to the ground, rocks, or driftwood.
As you can see, Indian fern is a real treasure for aquarists. It is not just a beautiful plant with lacy greenery, but a real workhorse that silently helps to maintain cleanliness and a healthy balance in the aquarium.
Its unpretentiousness is a huge plus. Even a beginner can handle it. And its ability to purify water of harmful substances makes it a reliable natural ally, working as a living filter.
By placing this fern in your aquarium, you will get both decoration and utility. It will create cozy shelters for fish and give the underwater world a natural, slightly mysterious look. This is a simple but very effective way to improve your aquarium.
