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Najas guadalupensis ‘Guppy Grass’ is a fast-growing and highly adaptable aquatic plant widely appreciated in freshwater aquariums. Known for its fine, delicate, and bright green leaves, it creates dense bushy structures that provide excellent shelter for fry—especially guppies, which inspired its popular name. This species is ideal for breeding tanks, community setups, and low-tech aquariums.
It thrives under a wide range of conditions and does not require CO₂ injection or nutrient-rich substrate. Its extremely fast growth makes it effective for absorbing excess nutrients, helping to prevent algae. Guppy Grass can be used floating or planted, offering great versatility in aquascaping. Regular trimming is recommended to keep the plant compact and to prevent overgrowth.
Ideal Parameters for Najas guadalupensis 'Guppy Grass'
| Light | Low to high |
| Temperature | 20–28 °C |
| pH | 6.0–7.8 |
| Water hardness | Soft to hard (3–20 °dGH) |
| CO₂ | Not required |
| Growth rate | Very fast |
| Placement | Midground / background or floating |
| Propagation | Stem cuttings |
Care tips:
- Ideal for breeding tanks due to its dense structure.
- Float the plant for faster growth and natural fry protection.
- Trim regularly to avoid shading other plants.
- Excellent natural nitrate absorber.
Illustrative photo. | Representative image only.