How To Grow Java Moss? [Tips To Grow It Faster]

Image of an aquarium with Java Moss

You can grow a Java Moss plant by allowing its rhizoids (tentacle-like feet) to attach and anchor on rocks, driftwood, gravel, decors, and other aquarium objects. Since attaching takes time, you can either use super glue, a fishing line, or elastic bands to secure the Java Moss to aquarium objects.

Let’s now understand what Java Moss needs to grow inside an aquarium.

What Does Java Moss Need To Grow?

Java Moss is a hardy plant, which means it can grow in the most challenging aquarium conditions.

However, you can create a beautiful underwater garden inside your aquarium with Java Moss by providing optimal conditions.

Given below are a few things that Java Moss needs to grow inside an aquarium.

Tank Size

The size of the tank will shrink as Java Moss starts to grow.

Therefore, at least a 5-gallon tank is required to ensure enough space for your aquatic pets to swim.

If you want to plant more than one moss plant, a 10-gallon tank is necessary.


Java Moss doesn’t need abundant sunlight to grow. Even with low fluorescent or LED lights, it can grow well.

Java Moss can live in a low-light environment because it can make its food even with low-light energy (less than 1.5 watt/gallon).

So avoid using high-intensity lights as they promote algae bloom.


Java Moss is hardy and can grow on substrates like stones, driftwood, or gravel.

Therefore, the substrate shouldn’t be a significant concern for growing this plant.

In addition, you can use fine powder or add a moss carpet to grow this plant inside the aquarium.

CO2 and Nutrients

Aquarists also use CO2 and fertilizers to accelerate growth and keep their Java Moss plant healthy.

In addition, you can add micronutrients such as nitrogen, potassium, and phosphorous to the water to speed up the growth rate of this plant.

High-Quality Filter

A good quality filter is required to maintain water quality.

The filter should be strong enough to ensure the water is circulated properly throughout the tank.

Water Temperature

Java Moss is hardy and can survive a wide temperature range. However, it grows faster in cold water than in warm water.

So the optimal temperature range for growing Java Moss is between 60°F to 86°F (16°C to 30°C).

On the other hand, warm water above 30°C will hamper its growth.

pH Level

The pH level for Java Moss should be in the range of 5 to 8.

This plant is more comfortable in relatively soft acidic water. However, it does equally well in neutral and alkaline waters.

If you observe any drop in the pH level, you can add shells and rocks to restore the pH level of the tank water.

Water Hardness

Java Moss does well in water with hardness in the range of 6 to 20 dGH.

However, this plant will easily survive even if it is kept outside this range.

Tank Maintenance

Clean water is a prerequisite for Java Moss.

So you must change 5% of the tank water every week and 20% of the water every month.

Besides water change, the temperature and pH level should be optimal to facilitate faster growth.

In addition, use mild liquid soap with lukewarm water to clean the tank and avoid using soap with strong chemicals.

Finally, use a gravel vacuum cleaner or siphon to clean the aquarium’s gravel, rocks, stones, and decorations.

What Are The Different Ways To Grow Java Moss?

Java Moss is comparatively easy to grow and maintain than many other aquatic plants.

It uses its rhizoids to attach to surfaces like rocks, stones, decor, driftwood, and gravel.

Given below are the different ways to grow Java Moss inside an aquarium:

Java Moss Carpet

To create a moss carpet, you must attach the moss plant to flat and non-floating objects like aquarium rocks, stones, or driftwood.

It’s common to use either a cotton thread or a fishing line to attach the plant to a substrate.

However, a fishing line is a better option than cotton as it doesn’t rot like cotton.

You can use any substrate, but to ensure everything grows evenly, layering the moss plant on driftwood, rocks, or any other material is essential.

Whatever method you choose, be sure your moss is weighted down and secured so it won’t float away.

Finally, you can even use elastic bands or specialized plant adhesives like super glue to attach and secure your Java Moss plant to the aquarium substrate.

Java Moss Wall

For this method to work effectively, you will need to make sure that there is enough room between the top edge of the glass and the bottom edge of the aquarium.

Next, create an aquarium stand by attaching small suction cups to the back of the tank.

Then place the Java Moss plant against the aquarium wall so that it sits securely without falling off.

Java Moss Tree

To grow a Java Moss tree, use a driftwood piece with several branches.

Next, add some tiny natural sponges for roots and coat them with special plant super glue.

The branches can be attached using super glue and then placed on the sponge.

Once the moss starts to grow, you will need to trim it appropriately to get the desired tree shape.

It’s essential to let Java Moss grow naturally and spread out evenly.

If you don’t do that, the moss will end up growing freely without any support, making it difficult to trim.

Java Moss Floating Ball

Another way to grow Java Moss is to roll it up into a ball and secure it using super glue or s string at a few places.

You can adjust the floating ball’s height by altering the length of the string.

Pruning the moss can be done according to the needs of the aquarium.

Besides adding decor to the tank, the moss also helps provide extra habitat for your fish and other inhabitants.

Java Moss Cave Overhangs

If the aquarium cave has a surface made out of glass, rock, or ceramic tile, you can use aquarium-safe super glue to attach the anchor material so that it does not move when water hits the surface.

However, if it fails to attach firmly, you can use strips of aquarium-safe sponge to attach it.

After attaching the anchor material to the cave, use a string to attach the moss.

To create a hidden cave, allow the front side of the moss to grow into a sizeable overhanging shape first.

Then, trim off the backside to match the underlying rock formation.

Does Java Moss Grow Fast?

Java Moss doesn’t grow fast. Typically, the Java Moss plant takes around 3 to 4 weeks to attach securely inside the tank. Under optimal conditions, it can grow around 2 to 3 mm per day or 1 to 1.5 inches per month. However, its growth depends on the aquarium’s lighting and water conditions.

In low light (less than 1.5 watt/gallon), moss grows slightly slower than under medium light (2 to 4 watt/gallon).

However, be cautious while using lights for growing plants because they may cause algae to bloom if overused.

In addition, a regular supply of CO2, well-circulated clean water, and sufficient nutrient dose can help improve the growth rate of your Java Moss plant.

Tips To Grow Java Moss Fast

Below are some practical ways to accelerate the growth of Java Moss:

  1. Increase the light intensity of your tank. This will produce a fast-growing light green moss. However, if you want dark green moss, you must reduce the light intensity and opt for dimmer lights.
  2. Adding CO2 and fertilizers to the tank can accelerate the growth rate and keep the Java Moss healthy.
  3. Java Moss grows faster in cold water compared to warm water. The preferred water temperature is in the range of 60°F to 86°F (16°C to 30°C). On the contrary, warm water above 30°C will hamper its growth.
  4. Creating a pH level for Java Moss in the range of 5 to 8 is optimal for its fast growth.
  5. Regular water changes will also improve the growth rate of Java Moss. In addition, ensure that the tank water is clean as this plant doesn’t like a slimy tank.
  6. Use a strong filter to ensure the water is well circulated to every part of the tank.
  7. Getting rid of algae will also ensure the fast growth of Java Moss. This is because algae absorb the necessary nutrients from the tank that’s required for the faster growth of Java Moss.
  8. Trim the Java Moss plant regularly to stimulate growth and healthy development.

How To Grow Java Moss In A Jar?

To grow Java Moss in a jar, place it in a glass jar filled with potting mix.

Put some large rocks in the jar so that Java Moss has something to attach to.

Keep the jar open to allow the plant to absorb carbon dioxide.

In the absence of circulation in the jar, change 30 percent of the water every two to three days as the plant needs clean water.

Overexposure to direct sunlight can cause algae growth, which will harm your plant.

So maximum light exposure of up to one hour is sufficient. However, adequate ambient light will also be enough for the plant to grow.


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