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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.
| Light | medium to high |
| Temperature tolerance | 15 to 30 °C |
| Optimum temperature | 22 to 29 °C |
| Carbonate hardness | 0 to 10 °dKH |
| pH value | 5 to 7 |
| Carbon dioxide (CO2) | 20 to 40 mg/l |
| Nitrate (NO3-) | 10 to 50 mg/l |
| Phosphate (PO43-) | 0.1 to 3 mg/l |
| Potassium (K+) | 5 to 30 mg/l |
| Iron (Fe) | 0.01 to 0.5 mg/l |
Growth: slow
Propagation: Proliferating inflorescences, Splitting, cutting off daughter plants
Can grow emersed?: yes
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