Guppy Grass (Najas grass, Najas Guadelupensis)
You will get 1 handful of loose guppy grass.
Common nicknames include: Najas grass, Najas Guadelupensis.
Great easy to grow plant, works wonderfully for shrimp tanks and breeding tanks as it provides lots of natural cover! Fish and shrimp can absolutely tell the difference. These plants are most commonly free floated in the tank. They will grow roots and attach themselves to things over time.
Key Features
- Care: easy
- CO2: no
- Growth rate: fast
- Placement: background / free floating
- Lighting requirements: low
- Color: green
- Max size: constantly growing and expanding outward
- Propagation: cutting stems
| Feature | Detail |
|---|---|
| Care | Easy |
| CO2 Required | No |
| Growth Rate | Fast |
| Placement | Background / Free floating |
| Lighting | Low |
| Color | Green |
| Max Size | Constantly growing and expanding outward |
| Propagation | Cutting stems |
FAQ
Can guppy grass be planted directly on the substrate?
It is most commonly free floated, but it can attach to surfaces over time as it develops roots. Direct planting on substrate is not typical.
Does guppy grass require CO2 for growth?
No, guppy grass does not require CO2 to grow.
How do I propagate guppy grass?
By cutting stems and placing them in the tank where they will grow new plants.



Penelope Wilkins –
Guppy grass grew quickly in my shrimp tank. It provided excellent cover and the shrimp used it for hiding. Easy to maintain and doesn’t need much light. I cut a few stems and now have a few new plants spreading out.
Jane McDonald –
Great for a breeding tank. The plants spread fast and offer natural hiding spots for fry. I didn’t need to add any CO2 or special lighting. Just floated them in and they started growing within days.
Angela Gibson –
Perfect for beginners. The plant is easy to grow and stays green even in low light. I noticed the shrimp were more active and less stressed after adding it. No maintenance required beyond occasional trimming.