If you have ever tried to create an underwater garden in your aquarium, you have probably encountered naya. This plant is known to many as Guadeloupe naya. It is unpretentious, grows quickly, and saturates the water with oxygen.
But here lies the main paradox. With this plant, it is often the case that growing it is easy, but stopping it is a real challenge. It begins to grow at an incredible rate, filling all the free space.
As a result, instead of a neat bunch of greenery, after a couple of weeks you end up with thick, sometimes untidy thickets. They can interfere with fish and shade other, more capricious plants. Caring for the aquarium turns into a constant battle with this green “invader.”
Therefore, Naja is a vivid example of how the strength of a plant can become its main disadvantage for an aquarist. Let's figure out how to find common ground with it and turn its rapid growth from a problem into an advantage.
Distribution
In nature, Guadeloupe waterweed can be found in South and Central America. It prefers to grow in coastal areas of stagnant or slow-flowing water bodies, where it can form large clusters.
Growing and care
Najas is perfect for novice aquarists: this plant is undemanding, easy to grow, and adapts to environmental conditions. It will thrive in both tropical and moderately warm aquariums.
It is not necessary to root the plant; it will thrive in the water column. However, planting it in a single line in the background will look neater and create an attractive backdrop for other plants and underwater inhabitants.
Guadeloupe waterweed grows actively all year round, regardless of the season.
The fragility of the stems is perhaps the only drawback of naya. The plant is easily damaged, for example, when catching fish with a net. It can also be broken by a stream from the filter. However, the broken parts will not die; they are capable of continuing to grow and develop. So they can be rooted. Or caught and removed from the aquarium: the reproduction of naya will have to be controlled so that it does not take over all the free space.
Water parameters
Najas thrives at water temperatures between +18 and +30 degrees Celsius. However, the optimal range is considered to be between +22 and +26 degrees Celsius. It is best to maintain the pH between 6.2 and 7.5. Water hardness is not so important for this plant. However, if the water is too soft, the plant will grow less well. It is therefore recommended to maintain the hardness between 6 and 20. Replace 25% of the water weekly: the plant will feel better in fresh water.
It is not necessary to add additional CO2. The plant will thrive without it.
Guadeloupe waterweed, or naias, is a hardy aquatic plant that takes root easily and grows rapidly in ponds and reservoirs, but controlling its growth is much more difficult than simply planting it. One small piece of stem can turn into dense thickets over the course of a season, covering the surface of the water, interfering with other inhabitants of the reservoir, and disrupting the ecological balance. It is easy to grow: just throw it into the water, and it will start to grow. But stopping it, especially if it has already taken root, requires serious effort: mechanical cleaning, control of conditions, constant supervision. Therefore, before planting this species, it is worth thinking not about whether it will take root, but whether you will be able to cope with it later.
Lighting requirements
Najas can grow in natural light without artificial lighting. It can also withstand prolonged shading. However, its decorative properties will suffer, and you can forget about its bright green color.
So don't leave your plant without lighting. The length of daylight hours can vary widely, but should be no less than 7-10 hours per day.
To keep the plant looking bright green, use a 0.4 W LB fluorescent lamp per 1 liter. LD lamps can be used in combination with low-power incandescent lamps.
Soil requirements
The root system of the naya is poorly developed—it is needed more for attaching the plant than for extracting nutrients from the soil. The latter are absorbed by the entire surface of the Guadeloupe naya.
River sand
Fine gravel
This plant is not demanding in terms of substrate. Its development is practically not affected by the degree of silting or the nature of the substrate. It will feel great in both sand and gravel soil. Use other plants planted in the tank as a guide.
It is recommended to repot najas regularly. The fact is that the lower part of the plant may not get enough light. Therefore, the upper part of the plant will look attractive, but the lower part may become bare. Transplanting will preserve the beauty of this long-stemmed plant.
— Nathan Hill, Aquascaper and editor of PracticalFishkeeping magazine
Fertilizers for plants
The substances necessary for growth and development are absorbed by the entire surface of the naiad. Therefore, it requires liquid fertilizers (the nutrient content of the soil does not play a significant role).
It responds well to any mineral fertilizers, especially those containing potassium and iron.
Najas does not need frequent feeding. Once a month is quite enough.
Reproduction
Guadeloupe naiad can be propagated by cuttings. And it's very easy to do: any piece of stem will easily take root if planted in the ground. It is recommended to use cuttings with 3-4 internodes.
Adult plants tolerate transplanting well. Even regular changes of location do not bother them. They start growing quickly after the procedure.
Variations and forms
The Guadeloupe waterweed has several close relatives:
Indian (or royal) waterweed
Visually, it is very similar to Guadeloupe, but its leaves are longer and stiffer. Otherwise, the plants are almost indistinguishable: both have long stems, a rich green hue, and elongated, narrow leaves. Bright lighting causes the Indian naya to turn reddish in color. In its natural habitat, it grows in southeastern Asia.
Roraima
A variety that first appeared on the market in Japan. It is less common, which makes it more expensive. It has the same color as the Guadeloupe naiad, and its root system is also poorly developed. However, the leaves of the rolaima have a reddish pattern. In addition, the leaves of this variety are curved.
Najas herbaceous
This variety is often used by aquarists for design purposes. Planted in the background, it perfectly complements large-leaved plants.
Egeria
This variety is shorter than Guadeloupe Naja: its length does not exceed 0.5 m. But the other characteristics of the plants are similar, which makes them easy to confuse.
As you can see, Guadeloupe Naya is an amazing plant that can be both a blessing and a headache for aquarists. Its main “superpower” — incredible growth rate and unpretentiousness — is also its main challenge.
In fact, growing naya is easier than easy. The difficulty begins later, when it quickly takes over the space, entangles everything around it, and requires constant control. Caring for such an aquarium turns into regular “sanitary pruning” rather than contemplation.
Therefore, when considering planting this grass, it is worth honestly assessing your strength and time. If you are ready to take on the role of an attentive gardener who will guide the plant's vigorous energy, naya will become your faithful ally in creating a living, oxygen-rich underwater world. If you dream of a stable landscape that does not change every week, it may make sense to look at other, more restrained species.
