Species description

Care, breeding and tankmates

Plant profile

Placement

Midground

It is placed floating directly on the water's surface. It is incredibly useful for creating shaded areas in the aquarium, which benefits shy fish and helps control algae growth below. However, care must be taken to ensure it does not completely block light from reaching demanding underwater plants.

Botanical form

Floating

This floating fern features small, oval leaves covered in complex, water-repellent hairs that keep the plant afloat. Beneath the surface, it develops modified, root-like structures that trail in the water to gather nutrients. The intricate surface hairs give the leaves a very unique, almost velvety texture.

Growth

VERY_FAST

The growth rate is extremely fast, especially when provided with strong lighting and high nutrient levels. It can quickly cover the entire surface of an aquarium within a few weeks. Regular removal of excess plants is mandatory to maintain proper gas exchange and light penetration.

Substrate

None

As a free-floating aquatic plant, it has no interaction with the aquarium substrate. Its root-like modified leaves hang suspended in the water column to absorb nutrients directly. Therefore, substrate choices have zero impact on the health or growth of this species.

Column fertilization

Recommended

Liquid fertilization is the only way to feed this plant effectively. A comprehensive fertilizer containing nitrogen, phosphorus, potassium, and trace elements is highly recommended. Because it grows so fast, it is excellent at soaking up excess nutrients, making it a great natural filter.

Root fertilization

None

Root fertilization is completely inapplicable for this species as it never roots in the substrate. All nutrients must be supplied via the water column. Adding root tabs to the aquarium will only benefit this plant if those nutrients leach into the water.

Trimming

Occasional

Maintenance involves physically removing excess plants from the water surface rather than trimming them with scissors. Scooping out a portion of the colony weekly prevents it from blocking too much light. Ensure that discarded plants are disposed of properly and never introduced into local waterways. Regular thinning keeps the remaining plants healthy and vibrant.

Propagation

Division

Propagation is incredibly fast and occurs naturally as the plant splits and forms new branches. As it grows across the surface, it constantly divides into new, independent plants. To control the population, simply scoop out handfuls of the plant and dispose of them properly.

Sensitivity

Moderate

While generally hardy, Salvinia auriculata agg. is sensitive to strong surface agitation and excessive splashing, which can sink or damage its delicate leaves. It also dislikes condensation dripping onto its surface in closed-lid aquariums. High humidity combined with poor ventilation can lead to leaf rot. Ensure adequate airflow above the water surface for best results.

Layout role

Floating

In the aquascape, Salvinia auriculata agg. serves to create a natural, shaded environment reminiscent of a tropical stream or pond. The dangling roots provide a sense of depth and offer excellent hiding places for fry and small fish. It helps to diffuse intense lighting, creating a softer mood for the tank. Additionally, it aids in biological filtration by absorbing excess nutrients.