Red Root Floaters (Phyllanthus fluitans) are a South American floating plant that is unlike every other floating plant in the catalog in one important way: the leaves themselves turn red. Where Frogbit, Water Lettuce, Salvinia, and Water Spangles remain green regardless of conditions, Red Root Floaters produce round, slightly cupped leaves that blush from green through pink to deep red under high light intensity — the colour developing most intensely on the upper leaf surface exposed directly to the light source. The roots are always red, providing a visible splash of warm colour below the surface even in lower light conditions. The combination of the reddening leaf canopy above and the trailing red roots below makes Red Root Floaters the only floating plant in the catalog that contributes colour rather than just coverage, shade, and nutrient uptake. Requires calm surface water. Fully safe with all Neocaridina, Caridina shrimp, and snails.
Not RequiredCO₂
68–82°FTemperature
Med–HighLighting
What to Expect
Colour, Growth & Behaviour
Leaves blush red under high light — green under lower light — the intensity of the red colouration in the leaves is directly proportional to light intensity. Under low to medium light the leaves remain mostly green with pink tones at the margins. Under high light the upper leaf surface develops deep, saturated red colouration that covers most of the leaf face and reads clearly from across the tank. The colour develops over days of exposure to high light and fades over a similar period if light is reduced — adjusting light intensity is the primary tool for managing how red the plant appears.
Trailing red roots visible below the surface at all times — unlike most floating plants whose roots are colourless or pale, Red Root Floaters always produce red-pigmented roots that hang below each rosette and are visible from the side of the tank when plants are positioned near the glass. The root colour is maintained regardless of light intensity — a tank with Red Root Floaters under lower light will still show the characteristic red roots trailing below green leaves, providing a colour contribution even when the leaves have not fully reddened.
Round, slightly cupped leaves on a small rosette — the leaf form is similar to Frogbit — small, round, slightly cupped — but the Red Root Floater rosette is generally smaller and the leaves are held more horizontally, making the surface of each leaf more fully presented to the light above. Each rosette is clearly individual and maintains its separate identity at the surface rather than merging into a continuous mat.
Spreads by daughter plantlets on stolons — propagation is by short stolons that produce daughter plants at their tips — the same mechanism as Frogbit, at a similar rate. The colony builds steadily from the initial planting outward, covering available calm surface area over weeks and months. The spread is manageable — significantly slower than Salvinia natans — and easily controlled by removing individual plantlets during water changes.
Sensitive to surface agitation — calm water essential — Red Root Floaters are among the most agitation-sensitive floating plants in the catalog. Strong surface disturbance wets the leaf surface, inhibits the light absorption that drives the red colouration, and causes the plant to decline. Redirect filter outlets below the surface and away from the floating colony. The cleaner and calmer the surface, the more strongly the leaves colour up under available light.
How to Set It Up
Getting Started
1Redirect surface agitation before introducing plants — position filter outlets so surface water is calm in the zone where Red Root Floaters will float. This is the prerequisite for both plant health and full red colouration development — in disturbed surface conditions the plant survives but the leaves stay green and growth is suppressed.
2Provide high light for maximum red colouration — position the tank under a high-output light fixture or use the full intensity setting of an adjustable fixture during the photoperiod. The red colouration takes several days to develop fully under high light — evaluate colour after five to seven days of consistent high-light exposure before concluding that the plant is not colouring up.
3Position near the glass for root visibility — place the colony in the front portion of the tank where the trailing red roots are visible from the viewing glass. The roots are one of the defining visual features of this plant and are invisible when the colony drifts to the middle or back of the tank surface.
4Thin by removing complete rosettes — when thinning, remove whole rosettes at the stolon connection rather than trimming individual leaves. Maintain coverage at 40–60% of the surface to allow sufficient light penetration to plants below while retaining the colour event that a healthy Red Root Floater colony provides.
💡 Bonus Tip
Red Root Floaters above a planted Cryptocoryne layout — particularly above Cryptocoryne Pink Flamingo or Cryptocoryne Red in the midground — creates a warm-toned vertical colour composition that runs from the warm-pink or red tones of the Crypt leaves on the substrate to the deep red canopy at the surface, with the trailing red roots connecting the two zones visually. The effect is most vivid in a tank with dark substrate and high overhead light that simultaneously drives both the Crypt colour depth and the Red Root Floater leaf blushing.
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Browse more aquatic plantsPair Red Root Floaters with Frogbit, Water Lettuce, or submerged plants for a complete layout. Browse our Aquatic Plants collection.
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