Cyperus-species are widespread all over the tropics, but only a few of them are good underwater plants. Cyperus helferi from Thailand is the first Cyperus-species used in aquariums, 20-35 cm tall and a roset from 15-25 cm wide. It requires a relatively large amount of light, and CO2 addition is recommended to promote growth. In aquariums with good water flow the plant sways beautifully in the current. 
 
Plant info
Type:
Rosulate
 
Origin:
Asia
 
Country or continent where a plant is the most common. Cultivars arise or are bred in cultivation.
Growth rate:
Slow
 
Growth rate of the plant compared to other aquatic plants.
Height:
20 - 30+
 
Average height (cm) of the plant after two months in the tank.
Light demand:
Medium
 
The average or medium light demand of an aquarium plant is 0,5 W/L.
CO2 :
Medium
 
A medium need in CO2 is 6-14 mg/L. A high demand in CO2 is approx. 15-25 mg/L.