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Phyllanthus fluitans

Phyllanthus fluitans

Phyllanthus fluitans is a versatile tropical floating plant, cherished for its heart-shaped leaves and vibrant hues ranging from bright green to intense red under strong light. It grows rapidly across the water's surface, offering shelter and creating a captivating visual layer in the midground of the aquarium.

Taxonomy
Class:Liliopsida
Order:Malpighiales
Family:Phyllanthaceae
Genus:Phyllanthus
Species:Phyllanthus fluitans

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Water Temperature

18 - 30 °C

pH Value

5 - 8

Water type

Freshwater

Light

Medium to High

CO2

High

KH

0 - 14 dKH

Species description

Belonging to the family Phyllanthaceae, Phyllanthus fluitans is a member of the extensive Phyllanthus genus, which encompasses over 1200 diverse species, most of which are terrestrial. This particular aquatic species stands out due to its unique adaptations to a floating lifestyle, a less common trait within its family. Although it is often mistaken for an aquatic fern due to its appearance, it is not botanically related to ferns but is a flowering plant with a well-defined genetic classification within the eudicots. Phyllanthus fluitans presents as a robust floating plant, characterized by slender, flexible stems that extend horizontally across the water's surface. Its small, heart- or kidney-shaped leaves are alternately arranged along these stems.

Care, breeding and tankmates

This plant adapts to a wide range of water parameters, making it quite tolerant and versatile for various aquatic setups. It prefers temperatures between 18.0 and 30.0 °C, reflecting its natural tropical environment. The ideal pH ranges from 5.0 to 8.0, while carbonate hardness (KH) can vary from 0.0 to 14.0. Although tolerant, maintaining stable values within these ranges will help prevent stress and promote healthy growth, though slightly acidic and soft water are often associated with better coloration. Phyllanthus fluitans is generally a robust plant, but it can be sensitive to unfavorable environmental conditions.

Geographic Origin and Distribution

This species originates from: South America.

Origin

Amazon, Orinoco, and Guianas

Plant profile

Placement
Midground

When deciding where to place Phyllanthus fluitans, the water surface is generally the most ideal location. This placement allows the plant to showcase its unique form without being completely overshadowed by larger species. Ensure it receives adequate light penetration and water flow in this spot. Thoughtful positioning will greatly enhance the visual depth and balance of your aquascape.

Botanical form
Stem

Botanically, Phyllanthus fluitans grows as a floating plant, forming interesting structures as it matures. Its leaf morphology and overall geometry add a beautiful texture to the aquatic layout. The distinct green to deep red hues provide excellent contrast against traditional green foliage. Understanding its natural growth habit is key to trimming and maintaining its shape.

Growth
Fast

The growth rate of Phyllanthus fluitans can be described as fast under optimal conditions. Providing high light and stable CO2 injection will help maintain a consistent and healthy growth pace. In lower light or nutrient-poor setups, its development will noticeably slow down. Regular monitoring is advised to keep its growth pattern well-managed.

Substrate
None
Column fertilization
Recommended

Liquid water column fertilization is highly beneficial for Phyllanthus fluitans. It absorbs a significant portion of its required nutrients directly through its leaves. Dosing a balanced liquid fertilizer daily or weekly promotes vigorous growth and intense coloration. Be sure to provide ample potassium and trace elements to support its metabolic processes.

Root fertilization
None

While water column dosing is crucial, Phyllanthus fluitans also benefits greatly from a nutrient-rich substrate. Root tabs can be inserted near its base to supply a steady stream of long-lasting nutrients. A good soil substrate encourages the development of a strong root system, anchoring the plant securely. This dual-feeding approach ensures maximum vitality and resilience.

Trimming
Occasional

Trimming Phyllanthus fluitans requires a careful approach to encourage bushy and attractive regrowth. Use sharp aquascaping scissors to make clean cuts just above a healthy set of leaves or nodes. Regular pruning prevents the lower portions from becoming shaded and bare. The cuttings can often be replanted to propagate the species further.

Propagation
Cuttings

Propagating Phyllanthus fluitans is most commonly achieved through runners. By taking healthy sections and replanting or reattaching them, you can easily multiply your stock. Ensure the new pieces have access to sufficient light and nutrients to establish themselves quickly. Over time, these propagated sections will grow into entirely independent and lush plants.

Sensitivity
Moderate

Phyllanthus fluitans can be somewhat sensitive to sudden fluctuations in water parameters, particularly large pH or temperature swings. Algaecides and certain chemical treatments should be used with extreme caution. It requires a stable environment with consistent CO2 levels to prevent melting. Maintaining excellent water quality through regular changes is essential for its well-being.

Layout role
Midground, Floating

In terms of aquascaping, Phyllanthus fluitans plays a vital role as a structural or accent element. Its floating nature and green to deep red appearance make it perfect for creating focal points or softening hardscape lines. By grouping several stems or patches together, you can achieve a dense and visually striking effect. It seamlessly bridges the gap between different zones in the aquarium.

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

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Last updated: 06/16/2026
Phyllanthus fluitans Care Guide & Tank Setup | Atlarium