Guppy Grass 101: A Step-By-Step Guide for Growing & Caring

Aquatic plants are an important addition to any aquarium, as they add aesthetic value and provide numerous benefits for small fish and other inhabitants. One of the most popular aquarium plants plants is Guppy Grass.

Guppy Najas grass, an aquatic plant with the scientific name Najas guadalupensis, is a species of aquatic plants growing in shallow waters near tropical coasts worldwide.

While Naja grass is a great plant addition to any aquarium setup, caring for this unique species of plants can seem daunting – especially if you’re starting as an aquarist.

Guppy grass care

That’s why we created this ultimate guide: we will explore the world of Grass guppy and learn everything you need to know to grow and care for this beautiful plant.

We’ve covered you, from researching the right conditions to providing proper lighting and maintenance tips!

What is Guppy Grass?

Guppy Najas Grass is a fast-growing aquatic plant in the family Hydrocharitaceae. It is native to Central and South America local waterways and is commonly found in shallow, slow-moving waters.

The plant has thin, bright green leaves that grow 2 inches long and 0.5 inches wide.

Najas Grass is popular among aquarium enthusiasts due to its fast growth rate and ability to absorb nitrates, carbon dioxide, heavy metals and other toxins from the water. It is also a natural food source for many fish species.

Guppy Naja grass offers the perfect start for a new generation of fry, with shade and nourishment to fuel their growth. If you’re interested in bringing this lush freshwater plant into your tank, make sure you understand its requirements so that it can thrive!

This annual aquatic plant boasts full, luscious foliage in various colors, from light to dark green.

On closer inspection, one may discover the tiny unicellular teeth adorning its long and flexible leaves, giving them an almost translucent look.

Aquarium owners can give newly hatched fry a haven and nutrition to grow by providing guppy Najas.

This aquatic vegetation provides ideal cover for young fish and an ongoing food source of infusoria – tiny organisms essential for developing healthy juvenile fish.

Is Guppy Grass Easy to Grow?

Can Guppy Grass Be Planted? Generally, guppy najas grass is a species of aquarium plant that is relatively easy to grow.

Grass Najas needs lighting, water temperature, and ph. Once you have a proper balance, these will give your grass much more chances of thriving.

These three factors are important but fall in the typical ranges of many other aquarium plants. Generally, Naja grass has a good growth habit.

It isn’t necessary to apply fertilizer. Generally speaking, though, guppies grass will be healthier by adding fertilizer. This can help Najas grass in less desirable situations and tanks lacking water.

Why Should You Grow Guppy Grass?

What Is Guppy Grass Good For? Guppy Najas Grass is an excellent addition to any aquarium due to its numerous benefits. Some of the key benefits of guppy grass include the following:

4 Benefits of Growing Guppy Grass

  • Oxygenation: Najas Grass is known to release large amounts of oxygen into the water, which helps to maintain a healthy environment for fish and other aquatic life.
  • Natural filtration: The plant absorbs nitrates and other toxins from the water, which helps to keep the aquarium clean and free of harmful chemicals.
  • Provides hiding places: The dense foliage of Naja Grass provides excellent hiding places for fish and other aquatic life, which helps to reduce stress and increase their overall well-being.
  • Nutrient-rich: Guppy Najas is a rich source of nutrients, which can benefit fish and other inhabitants.

Planting or Floating Najas Grass?

It is either planted or left floating on its own. The cool thing about guppy grass is its leaf shape changes as it grows. If it is grown, the leaves will be more similar to if they were moved.


The idea sounds nice and clever at first, but the real truth is that your plants can melt if they are put in place while they’re in the air and it’s floating.

In addition, since they are not substrate-feeding plants, your success rate is significantly higher. Those who insist on planting this plant know it will eventually break into thousands.

Where Can I Buy Guppy Grass?

Guppy grass for sale is available in many aquariums and pet stores. You can also buy guppy Naja grass online from retailers like Amazon.

Read the reviews before purchasing, as different varieties may be better adapted for certain tanks and water conditions. When you have found the perfect type of Najas Grass for your tank, it’s time to plant it! 

Guppy Grass Natural Habitat & Tank Conditions

Guppy Najas grass can develop with little effort, and it does not require any additional CO2 soil or fertilizer through a liquid fertilizer that can also be used if wet.

Because they can grow easily in countless water conditions, you can usually pick the best temperature and flow for their aquatic pets.

A substrate isn’t necessary when you’re floating the grass. If you planted a, as grass, you would need certain substrate types.

Generally speaking, a fish that feeds on water, like catfish, should choose soft sand as gravel can damage its underbelly.

Guppy Grass Temperature, Hardness, and pH


Ideal temperature conditions for growing guppy Najas grass are 20– 26C (6 – 79 degrees F). Despite being sensitive, its temperature range is varied.

Grassguppy ph Level:

Suitable guppy grass pH values should vary between 6.0-8.8. Hardness: Guppy Naja grass is very tolerant of dry water. Hardness tolerances for Waters range from 2 to 20 g.hg/m2.

Light Requirement: Does guppy grass need light?

It must be light for grass. If you are looking to get plants without sunlight, look to Hornwort. Grass guppy becomes greener with more light but starts yellowing under too bright light.

Guppygrass needs light exposure daily, at least 8 – 12 hours daily. Apart from a red-brown hue exposed under very light conditions, it can cause damage.

These plants are quite versatile, but you need to know some guidelines for aquarium lighting. Guppygrass can be found in moderate and low light under tank conditions, and in high light, it can cause the plants to develop swollen leaves.

Although this may seem attractive visually, make sure if a particular plant changes color, it isn’t thriving, and you should try and limit light exposures.

How Fast Does Guppy Grass Grow?

They’re growing rapidly. The resulting growth rate can indicate how much it will take to overfill a tank in a couple of weeks – even sooner. These conditions apply specifically to high high-stock such as guppy breeding colonies tanks.

Guppy Naja Grass is a fast-growing, easy-to-care-for aquatic plant that’s great for any aquarium. It provides a natural hiding place for shy fish, absorbs excess nutrients from the water, which helps keep algae at bay, and provides great plant cover for your aquarium’s inhabitants.

Where To Plant Guppy Grass?

Generally speaking, guppy grass plants should be used for background planting but works well in places where it floats on a river column. You could also anchor the plant to the bottom by placing the plant weight on top.

Another option is to plant the grass on a substrate and use it for foreground planting.

If you’re using guppy grass for a carpet, it’s best to plant it in small bunches to provide better coverage. You can also use guppy grass as a midground feature to create a stunning landscape.

Tank size guppy grass: Naja grass can be planted in community tanks of all sizes, provided the plants are not overcrowded. If the tank has enough nutrients, it will thrive and create a lush landscape for your fish.

Guppy Grass Aquarium and Tankmates

Guppy grass can be best used in guppies, though the name suggests. Guppy grass can be adapted to most plants and animals with low light.

Some snail species and herbivore fish, including pleco, goldfish, crabs, rose barbs, snails, and trichome fish, also feed upon these plants.

Guppy grass is a very popular choice in freshwater crab tanks. They are famous for destroying plant tanks very easily. But in this situation, this shouldn’t cause any trouble.

How to Grow Guppy Grass?

How to plant guppy grass? Guppy Grass is relatively easy to grow and care for, making it an excellent choice for beginners.

Here are the steps to grow Guppy Grass in your aquarium:

Step 1: Choose the Right Conditions

Guppy Grass thrives in many conditions but prefers bright, indirect light and a water temperature between 72-82°F. The pH level should be between 6.0-8.0, and the water hardness should be 5-15 dGH.

Step 2: Planting Guppy Grass

Planting Guppy Grass is straightforward. Using a fishing line, you can plant it directly into the substrate or attach it to a piece of driftwood or rock. Be sure to plant the roots firmly into the substrate or attach the plant securely to the driftwood or rock.

Step 3: Provide Nutrients

Guppy Grass is a fast-growing plant that requires a steady supply of nutrients to thrive. Using a liquid fertilizer or adding root tabs to the substrate, you can provide nutrients to the plant.

Step 4: Maintenance

Guppy Grass requires minimal maintenance. However, you should trim the plant regularly to prevent it from overgrowing. Trimming also encourages the plant to grow bushier and denser, providing better hiding places for fish.

Common Problems with Guppy Grass & How to Solve?

While Guppy Grass is generally an easy-to-care hardy plant, it can experience some problems. Here are some common problems and issues and how to solve them:

Problem 1: Algae Growth

If you notice excessive algae on your Guppy Grass, it may be due to too much light or nutrients. You can solve this problem by reducing the light the plant receives or the nutrients you provide.

Problem 2: Yellowing Leaves

If your Guppy grass Najas leaves turn yellow, it may be due to a lack of nutrients or poor water quality. To solve this problem, check the water parameters and adjust the nutrient levels as necessary. You can also add root tabs or liquid fertilizer to give the plant additional nutrients.

Problem 3: Guppy Grass Melting

If your Guppy Grass Najas starts to melt and decay, it may be due to a sudden change in water parameters or poor planting technique. To solve this problem, check the water parameters and adjust them slowly if necessary.

You should also ensure that the white roots are firmly planted in the substrate or attached securely to the driftwood or rock.

IMPORTANT NOTE: Quarantine Guppy Grass Before Adding it to Your Tank

When adding guppy grass to your aquarium, always quarantine it first. This means removing the plant from its pot, washing off any dirt or debris, and placing it in a separate tank for at least two weeks. This will ensure that the plant is free from parasites and other contaminants.

Guppy Grass Care and Maintenance

Maintaining guppy grass can be done easily. This could cut off light penetration in the bottom plants unless you cut it every couple of weeks, and it should be avoided.

You either trim the plants and dispose of the rest or give this up to the other fish tank plants that can go in your garden.

Alternatively, you should replenish tank water by adding fluid nutrients if water changes or nutrients can not be found in the soil. Trimming is really important.

How to Propagate Guppy Grass?

Propagating Guppy Grass is easy. Here are simple steps to propagate the plant:

Step 1: Wait for New Shoots

Guppy Grass propagates by sending out runners that produce new shoots. Wait for new shoots to appear before attempting to propagate the plant.

Step 2: Cut the Runners

Once you see new shoots, you can cut the runners and separate them from the parent plant. Cut the runners close to the parent plant to avoid damaging the new shoots.

Step 3: Plant the New Shoots

Plant the new shoots into the substrate or attach them to driftwood or rock as you would with the parent plant. Ensure they have the same conditions and nutrients as the parent plant.

Commonly Asked Questions about Guppygrass (FAQs)

Are There any Fish that Eat Guppy Grass?

Goldfish are notorious for eating Naja grass. The following may make sense if your goldfish is on the run. Other than goldfish, no fish are likely to eat it.

Is Guppy Grass suitable for all types of aquariums?

Yes, Guppy Grass is suitable for all types of aquariums, including freshwater and saltwater.

Can Guppy Grass grow in low-light conditions?

Yes, Guppy Grass can grow in low light conditions but may grow slower than in bright, indirect light.

How Often Should I Trim My Guppy Grass?

You should trim your Guppy Grass regularly, depending on how fast it grows. A good rule is to trim it once a month.

Can Guppy Grass survive without additional fertilizers?

Guppy Grass can survive without additional liquid fertilizers, but it will grow faster and healthier with the addition of nutrients.

How Long Does it Take for Guppy Grass to Propagate?

Guppy Grass propagates relatively quickly, and you should start seeing new shoots within a few weeks.

Can Guppy Grass be Grown Emersed?

Guppy Grass can be grown emersed but will require different conditions than when submerged.

Is Guppy Grass Safe for All Fish?

Yes, Guppy Grass is safe for all fish, but it may not suit some herbivorous fish that may eat the plant.

How Can I Prevent Algae Growth on My Guppy Grass?

You can prevent algae growth on your Guppy Grass by providing moderated light and nutrients and maintaining good water quality.

How Can I Anchor Guppy Grass to Driftwood or Rock?

Using a fishing line or cotton thread, you can anchor Guppy Grass to driftwood or rock. Tying the line tightly to prevent the plant from floating away.

Can Guppy Grass be used as a carpeting plant?

Guppy Grass can be used as a carpeting plant, but it may require regular trimming to maintain its shape and size.

Can Guppy Grass Grow in Gravel?

Yes, Guppy Grass can grow in gravel, but it will require a thick substrate layer and regular fertilization to remain healthy.

Is Guppy Grass a Floating Plant?

No, Guppy Grass is not a floating plant. It attaches itself to substrate or driftwood and grows in the water column. However, it does produce small floating leaves that can help it spread throughout the tank.

Why Is My Guppy Grass Turning Brown?

Guppy Grass can turn brown if it is not getting enough light, nutrients, or CO2. Check all the parameters and ensure they are within the desired range. You may also need to add additional CO2 if you are using a low-tech setup.

Is Guppy Grass Hard to Grow?

No, Guppy Grass is not hard to grow. However, it can be very sensitive to changes in water parameters and may require additional attention if not provided with the right conditions. Be sure to check the water parameters regularly and adjust them as needed.

Is Guppy Grass Invasive?

No, Guppy Grass is not generally considered to be an invasive species. However, it can become a nuisance if allowed to spread unchecked. Monitor its growth and prune it regularly to prevent it from taking over the tank.

What is a Blue Grass Guppy?

Guppy Blue Grass is a type of guppy that has a unique coloration. It has a deep blue body with yellow accents and can be found in any local fish store. It is also known to be a bit more hardy than other guppy varieties.


The grass guppy is the perfect aquatic companion for any aquascape: its vibrant colors contrast with other plants and can be easily attached to nearly any aquarium décor. This stunning species requires minimal lighting conditions and no additional supplements, making them an ideal choice for your unique setup! Guppy Grass is an excellent addition to any aquarium due to its numerous benefits, including natural filtration, oxygenation, and providing hiding places for fish. Growing and caring for Guppy Grass is relatively easy, making it an excellent choice for beginners. By following the steps outlined in this guide, you can grow and propagate Guppy Grass plants successfully in your aquarium.

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About Me

I am the founder of, a devoted wife and mother, and an avid fish enthusiast. My aim is to assist fellow fish lovers worldwide in understanding how to properly care for and breed their pet fish.

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