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Pothos can grow underwater in an aquarium.
But there are some important details to know before you submerge them completely.
If you are wondering if pothos can grow underwater in an aquarium, the short answer is yes.
Pothos are incredibly adaptable plants that can survive and even thrive when fully submerged.
They are often used in aquariums as a natural way to filter water and control algae.
In this post, we will explore exactly how pothos can grow underwater in an aquarium.
We will cover the conditions needed, the benefits, and the potential challenges.
Let’s dive right in.
Why Pothos Can Grow Underwater in an Aquarium
Pothos can grow underwater in an aquarium because they are semi-aquatic by nature.
In the wild, pothos often grow along riverbanks where their roots are submerged.
They have adapted to survive periods of flooding and low oxygen in the water.
This natural resilience makes them ideal for aquarium use.
Here are the main reasons pothos can grow underwater in an aquarium.
1. Pothos Have Aerenchyma Tissue
Pothos can grow underwater in an aquarium thanks to specialized tissue called aerenchyma.
This tissue contains air pockets that help the plant stay buoyant and exchange gases.
Even when fully submerged, the leaves and stems can still get some oxygen.
This allows the plant to continue photosynthesis and growth under water.
2. They Absorb Nutrients Directly from Water
One reason pothos can grow underwater in an aquarium is how they absorb nutrients.
Instead of relying solely on soil, they can take up nitrates and ammonia through their leaves and stems.
This makes them excellent natural filters for your aquarium.
The plant helps keep the water clean while growing healthy underwater.
3. Low Light Tolerance
Pothos can grow underwater in an aquarium because they tolerate low light conditions.
Aquariums often have limited light, especially in deeper tanks.
Pothos are shade-loving plants that can still photosynthesize with minimal light.
This makes them a good choice for planted aquariums with lower light setups.
4. Slow Growth Underwater
Pothos can grow underwater in an aquarium but at a much slower pace than above water.
The lack of abundant carbon dioxide and light slows down their metabolism.
This is actually beneficial because it means less frequent trimming.
You can enjoy a lush green underwater plant without constant maintenance.
How to Set Up Pothos to Grow Underwater in Your Aquarium
To ensure pothos can grow underwater in an aquarium successfully, you need proper setup.
Follow these steps to give your pothos the best chance.
1. Choose the Right Pothos Variety
Not all pothos varieties respond the same when submerged.
Golden pothos and marble queen pothos are two of the most reliable for underwater growth.
Avoid variegated types with too much white, as they may struggle with lower light.
2. Acclimate the Plant Slowly
Do not simply toss a potted pothos into your aquarium.
Start by placing the roots in water for a few days while the leaves remain above.
Then gradually lower the plant until the leaves are fully submerged.
This slow transition helps the plant adjust to the new environment.
3. Provide Adequate Lighting
Pothos can grow underwater in an aquarium with moderate light, but not scorching light.
Use an aquarium LED light on a timer for 8 to 10 hours per day.
Too little light will cause the leaves to yellow and the plant to decline.
4. Anchor the Plant Properly
Pothos roots need to be anchored so the plant stays in place.
You can use aquarium plant weights or tie the stems to driftwood or rocks.
Avoid burying the stems in substrate, as this can cause rot.
The leaves and stems should be free to float or rest on the surface.
Benefits of Growing Pothos Underwater in Aquariums
Pothos can grow underwater in an aquarium and bring several advantages to your tank.
1. Natural Water Filtration
Pothos absorb nitrates, ammonia, and phosphates from the water.
This reduces algae growth and keeps the water chemistry stable.
Many aquarists use pothos as a living filter for freshwater tanks.
2. Oxygen Production
During photosynthesis, pothos release oxygen into the water.
This benefits fish and other aquatic life.
Better oxygen levels mean healthier fish and less stress.
3. Aesthetic Appeal
Pothos can grow underwater in an aquarium and create a beautiful green backdrop.
Their trailing vines and heart-shaped leaves add a natural jungle look.
They also provide shade and hiding spots for shy fish.
4. Cost-Effective and Low Maintenance
Pothos are one of the cheapest aquarium plants you can use.
You only need a cutting or a small plant to get started.
They require no special fertilizers or CO2 injection.
Just regular water changes and trimming keep them happy.
Potential Challenges When Pothos Grow Underwater in an Aquarium
While pothos can grow underwater in an aquarium, there are also drawbacks to consider.
1. Leaves May Rot or Melt
Some leaves will die off when first submerged because they are not adapted.
This is normal, and the plant will grow new aquatic leaves.
Remove any rotting leaves quickly to avoid fouling the water.
2. Slow Growth Can Be Frustrating
Pothos can grow underwater in an aquarium, but they grow much slower than emersed forms.
If you want fast coverage, you may need to start with several cuttings.
3. Risk of Overcrowding
Pothos can grow underwater in an aquarium and quickly take over the tank.
Their roots can become a tangled mass that blocks water flow.
Regular pruning is necessary to keep them manageable.
So, Can Pothos Grow Underwater in an Aquarium?
Pothos can grow underwater in an aquarium with proper care and patience.
They are adaptable, low-maintenance plants that offer natural filtration and beauty.
Start with a healthy cutting, acclimate gradually, and provide moderate light.
Keep an eye on water parameters and remove any dying leaves.
With these steps, pothos can grow underwater in an aquarium and become a thriving part of your aquatic ecosystem.
Enjoy the lush green look and the cleaner water they bring.