Amazon frogbit care

Limnobium laevigatum

Amazon frogbit (Limnobium laevigatum)
Photo: Cardex, Public domain, via Wikimedia Commons

Frogbit is a floating plant with round leaves and long roots that fish and fry hide in.

Light
Medium
CO₂
Not needed
Where it goes
Floating at the surface
Growth
Fast
Care level
Easy
Height
1 to 2 in
Temperature
64 to 84 °F
How to plant
Float it on calm water with the leaves dry
Propagation
Runners

In a 20 gallon long

12¾ in tall
Drawn at its usual full height on the same scale as the tank.

How to grow amazon frogbit

Frogbit is a floating plant with round leaves and long roots that fish and fry hide in. It needs a calm surface and a gap under the lid; it pulls nitrate from the water as it grows.

Common problems

  • Rotting leaves from condensation drips or strong surface flow.
  • Covering the whole surface; remove some each week.

Light for amazon frogbit

Medium-light plants grow best under a planted-tank LED that spans the tank. Check the mounting length against your tank before buying: how to fit a planted light.

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Fluval Plant 3.0 22W

Adjustable mounting range 15–24 in; maker publishes 1,450 lm and PAR at several depths.

Finnex Planted+ 24/7 CRV-24

Fixed 24-in fixture model; fit depends on the supplied legs and tank span.

Plants that grow in the same light

Sources

Plant identity from Wikipedia: Limnobium laevigatum. Heights, temperatures and care are typical ranges in aquariums from common planted-tank practice, not figures from that article. Drawings are our own; photo credits follow.

Photo credits

Real photographs from Wikimedia Commons, resized and cropped to fit; each is used under the license named.