Narrow Ludwigia (Ludwigia arcuata): Care Guide for Aquarists

Narrow Ludwigia, Ludwigia arcuata, is a striking aquatic plant cherished for its delicate, needle-like leaves and vibrant colouration. Originating from North America, it has become a favourite among aquascapes for creating contrast and depth in planted aquariums.

Origin and Natural Habitat

Ludwigia arcuata is found in the wetlands and along the stream banks of North America, where it thrives in soft, acidic waters under a canopy of dense vegetation. These conditions hint at the care needed to replicate its natural habitat in an aquarium setting.

Growth Characteristics

Growth Rate

This plant exhibits a moderate growth rate, which can accelerate under optimal conditions of lighting and nutrition. Its slender stems can reach upwards, creating a beautiful, bushy appearance when grouped together.

Lighting Requirements

Ludwigia arcuata requires moderate to high lighting to develop its characteristic bright red or orange hues. Lower lighting conditions will result in more greenish growth, while higher intensity will enhance its colouration and promote denser foliage.

Water Conditions

It prefers soft to moderately hard water, with temperatures ranging from 24°C to 28°C and a pH of 6.0 to 7.5. Regular water changes are beneficial to maintain optimal conditions and support vibrant growth.

Planting and Maintenance

Ludwigia arcuata should be planted in small groups to create a full, lush appearance. Its narrow leaves and branching habit make it an excellent choice for midground or background placement. Regular pruning will encourage bushier growth and prevent the lower leaves from being shaded out.

Fertilisation and CO2 Supplementation

For the best growth and colouration, supplementation with CO2 and regular dosing of liquid fertilisers rich in iron and other micronutrients is recommended. These additions will support the plant’s rapid growth and vibrant colouration.

Propagation

Propagation of Ludwigia arcuata is straightforward: simply cut the top portion of a stem and replant it in the substrate. The parent stem will often produce new side shoots, enabling easy cultivation and spread within the aquarium.

Benefits in the Aquarium

Beyond its aesthetic appeal, Narrow Ludwigia can help improve water quality by absorbing excess nutrients, thereby reducing the likelihood of algae outbreaks. It also provides shelter and breeding grounds for aquatic life.

In conclusion, Narrow Ludwigia (Ludwigia arcuata) offers a unique aesthetic appeal with its fine texture and vivid colouration. It’s an excellent choice for aquarists seeking to add depth and interest to their planted tanks. With proper care, this plant can thrive and become a stunning feature in any aquarium.