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Salvinia Natans (Salvinia natans)

Salvinia natans is a floating fern with paired oval leaves covered in tiny water-repellent hairs that keep it riding high and dry on the surface, shading the tank and exporting nutrients fast. It needs no CO2 and thrives across a wide light range, growing quickly enough to need regular thinning. Because Salvinia species are regulated as noxious weeds in parts of the United States, check your state and local rules and never release it into natural waterways.

Care specifications

TypeFloating
DifficultyEasy
LightLow (20–100 µmol PAR)
CO2Not needed
Fertilizer demandLow
Growth rateFast
Max height1 in
Spread2 in
PlacementFloating
Attaches to hardscapeNo
Snail & shrimp safeYes
Temperature64–82 °F
pH6–7.5
ColorGreen
TrimmingRegular
StylesJungle, Biotope, Nature

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Salvinia Natans

Salvinia Natans

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Propagation

It multiplies by fragmentation; the floating fronds branch and split into new plants on their own.

Frequently asked questions

Is Salvinia natans legal to own in the United States?

It depends on your state. The genus Salvinia includes federally regulated noxious weeds, and several states restrict or ban Salvinia species, so confirm your local regulations before buying and dispose of trimmings in the trash, never outdoors.

Why are my Salvinia leaves turning brown or sinking?

Usually it is overhead condensation or water droplets defeating the leaf's water-repellent hairs, often from a tight lid or splashy filter return. Improve airflow above the surface and avoid wetting the leaves, and dose a little fertilizer if growth is also pale.

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