Guppy Grass – Najas guadalupensis
Najas Plant, also known as Najas guadalupensis, Guppy Grass, or Najas Grass, is a fast-growing freshwater aquarium plant that provides excellent cover for fry, shrimp, and small fish. Its fine, branching stems create a natural, bushy look that works well in planted tanks, breeding tanks, shrimp aquariums, and low-tech setups.
This hardy aquarium plant can be grown floating or planted in the substrate, making it one of the most versatile plants for freshwater aquariums. Najas guadalupensis grows quickly under stable conditions and helps absorb excess nutrients from the water column, making it a great choice for beginner hobbyists and experienced aquarists alike.
Key Features
- Fast-growing freshwater aquarium plant
- Also known as Guppy Grass or Najas Grass
- Excellent cover for fry, shrimp, and small fish
- Can be floated or planted in the substrate
- Great for breeding tanks and shrimp aquariums
- Helps absorb excess nutrients from the water column
- Hardy, beginner-friendly, and easy to grow
Great For
- Shrimp tanks
- Guppy tanks
- Breeding aquariums
- Fry grow-out tanks
- Low-tech planted tanks
- Community aquariums
- Natural-style aquascapes
Care Guidelines
- Scientific Name: Najas guadalupensis
- Common Names: Najas Plant, Guppy Grass, Najas Grass
- Care Level: Easy
- Light: Low to Medium
- Temperature: 68–82°F
- pH: 6.0–7.8
- Placement: Floating, midground, background, or breeding cover
- Growth Rate: Fast
- CO2: Not required
Planting & Maintenance Tips
Najas guadalupensis can be floated at the surface or gently planted into the substrate. When floated, it creates excellent cover for fry and shrimp while helping diffuse light and create a more natural aquarium environment.
This plant grows quickly and may need regular trimming to prevent it from overtaking the tank. Healthy cuttings can be replanted or left floating to create fuller growth. Because Najas is delicate, handle stems gently during planting and maintenance.
Why Choose Najas Plant?
Najas Plant is one of the best aquarium plants for fry protection, shrimp cover, and beginner planted tanks. Its fast growth makes it useful for nutrient uptake, while its soft, branching structure gives small fish and invertebrates plenty of places to hide and graze.
Frequently Asked Questions
Is Najas guadalupensis the same as Guppy Grass?
Yes. Najas guadalupensis is commonly called Guppy Grass because it is often used in guppy breeding tanks and fry grow-out aquariums.
Can Najas Plant float in an aquarium?
Yes. Najas Plant can be grown floating or planted. Many hobbyists prefer floating it because it provides excellent cover for fry, shrimp, and small fish.
Does Najas Plant need CO2?
No. Najas guadalupensis does not require CO2 and grows well in many low-tech freshwater aquariums.
Is Najas Plant good for shrimp tanks?
Yes. Najas Plant is excellent for shrimp tanks because it provides cover, surface area for biofilm, and hiding places for baby shrimp.
How fast does Najas guadalupensis grow?
Najas guadalupensis is a fast-growing aquarium plant. Under good lighting and stable water conditions, it may need regular trimming.
Can beginners grow Najas Plant?
Yes. Najas Plant is very beginner-friendly and is a great choice for low-tech aquariums, breeding tanks, guppy tanks, and shrimp setups.
Is Najas Plant safe for fish, shrimp, and snails?
Yes. Najas Plant is safe for freshwater fish, shrimp, snails, and peaceful community aquariums.
Shop Najas Plant at Tropical Treasures Wyo
Najas Plant (Najas guadalupensis) is a hardy, fast-growing aquarium plant for shrimp tanks, guppy tanks, breeding aquariums, fry cover, and low-tech planted setups. Shop live aquarium plants, freshwater fish, shrimp, and planted tank supplies at Tropical Treasures Wyo in Cheyenne, Wyoming.
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