Finely toothed, needle-like submersed leaves (saw-toothed leaves on newly bought plants); turns copper to orange-red in good light, less red with high nitrate.
Needs
Care levelHard
LightHigh
CO₂Needed
GrowthMedium
HeightUp to 40 cm
Temperature20–25 °C
WhereMiddle of the tank
Feeds throughLeaves, from the water
FamilyHaloragaceae
Native toEastern North America (south-eastern Canada and the eastern and central USA south to Texas and Florida), Mexico, Central America, the Caribbean (incl. Cuba, Jamaica, Bahamas, Bermuda), Colombia, southern Brazil and Uruguay
Facts checked against sources on 16 Oct 2026. See sources
How to keep it
Strong light
Add CO2
Low nitrate (5-10 mg/l), higher phosphate (1.5-2 mg/l), steady iron for deep orange-red
