Pothos Underwater In Fish Tank – Transforming Your Aquarium Naturally

Ever looked at your beautiful aquarium and thought, “It needs a touch more green?” You’re not alone! Many aquarists dream of a lush, vibrant underwater world, and a common question that pops up is, “Can I actually put pothos underwater in my fish tank?” The answer is a resounding yes, and it’s one of the most rewarding, and surprisingly simple, ways to boost your aquarium’s health and aesthetics.

Let’s dive deep into how this common houseplant can become a star player in your aquatic ecosystem. We’ll cover everything from understanding its benefits to getting your pothos thriving, submerged or partially submerged, in your tank.

The Magic of Pothos in Your Aquarium: More Than Just Pretty Leaves

Pothos (Epipremnum aureum) is renowned for its resilience and ease of care, making it a fantastic candidate for aquarium integration. But its appeal goes far beyond its visual charm.

Nutrient Export: The Natural Filtration Powerhouse

Think of pothos as a living, breathing filter. Its roots are incredibly efficient at absorbing nitrates and phosphates – the primary byproducts of fish waste and decaying organic matter.

These compounds, while essential in small amounts, can quickly build up to toxic levels in an aquarium. By introducing pothos, you’re essentially giving these excess nutrients a natural outlet, helping to maintain water quality and reduce the frequency of water changes. This is especially beneficial for heavily stocked tanks or for beginners still mastering their maintenance schedule.

Oxygenation and Water Movement: A Breath of Fresh Air

As pothos grows and transpires, it releases oxygen back into the water. This process, known as photosynthesis, contributes to a healthier environment for your fish and invertebrates.

Furthermore, the trailing vines and submerged roots can create gentle water movement around them. This helps to prevent stagnant areas in the tank, ensuring better gas exchange and a more uniform temperature throughout the aquarium.

Providing Shelter and Enrichment for Tank Inhabitants

The lush foliage and intricate root systems of pothos offer fantastic hiding places and safe havens for your fish, shrimp, and snails. This is particularly valuable for fry (baby fish) or smaller species that might otherwise feel exposed.

The natural cover also reduces stress in many fish, allowing them to exhibit more natural behaviors. For shrimp, the roots and leaves provide surfaces to graze on biofilm and micro-organisms, supplementing their diet and keeping them engaged.

Aesthetically Pleasing: Bringing the Outdoors In

Let’s not forget the sheer beauty! Pothos adds a vibrant splash of green that can transform a sterile tank into a miniature natural paradise. Its trailing vines can cascade over the back of the tank or be trained to grow upwards, creating a stunning biotope effect.

Getting Started: Which Pothos is Right for Your Tank?

The good news is, most common varieties of pothos will do well in an aquarium setting. The most popular and readily available is the Golden Pothos, with its characteristic green and yellow marbled leaves.

Other varieties like Marble Queen, Neon Pothos, and Jade Pothos also perform admirably. The key is to source healthy cuttings from a reputable grower or even a healthy houseplant you already own.

Sourcing Your Pothos: From Houseplant to Aquarium Star

You might be surprised to learn that your existing houseplant pothos can be the perfect donor. Simply take a healthy cutting with at least one or two leaves and one node (the bump on the stem where a leaf grows from).

Alternatively, many aquarium plant retailers sell pothos cuttings specifically for aquarium use. This ensures the plant is free from pesticides and ready for an aquatic environment.

Planting Your Pothos: Submerged vs. Emergent Growth

There are two primary ways to introduce pothos into your aquarium: fully submerged or partially emergent. Both have their advantages and look fantastic.

Fully Submerged Pothos: A Lush Underwater Jungle

For a truly immersive look, you can plant your pothos cuttings directly into your substrate. This requires a bit more care, as the plant will need to adapt to living entirely underwater.

• Preparation is Key: Before planting, rinse the cutting thoroughly under lukewarm tap water to remove any soil or debris. Gently trim any damaged leaves or roots.
• Planting Technique: Use aquarium-safe tweezers or your fingers to create a small hole in your substrate. Gently insert the node of the cutting into the substrate, ensuring it’s anchored. Avoid burying the leaves.
• Initial Adaptation: In the first few days, you might see some leaves melt or decay. This is normal as the plant adjusts. Remove any decaying material promptly. The plant will then start to grow new, submerged-friendly leaves.
• Nutrient Needs: When fully submerged, pothos will rely more heavily on nutrients present in the water column. If you have a low-tech tank (without CO2 injection or strong lighting), it might grow slower.

Partially Emergent Pothos: The Best of Both Worlds

This is the most common and often easiest method for beginners. The leaves and upper stems remain above the water, while the roots trail down into the tank.

• Placement: You can simply float the cuttings in the tank, letting the roots dangle. Alternatively, you can rest the cuttings on the rim of the tank, with the roots reaching into the water.
• Anchoring: For a tidier look, you can use aquarium suction cups designed to hold plants or cables to gently secure the stems to the glass. Some aquarists also tie the stems to driftwood or rocks, allowing the roots to grow freely.
• Root Development: This method encourages robust root growth, which is where most of the nutrient absorption happens. The leaves, exposed to air, will thrive and grow quickly.
• Natural Filtration: The roots dangling in the water are perfectly positioned to act as a natural filtration system, drawing nutrients directly from the water column.

The Do’s and Don’ts for Pothos Success

Even though pothos is hardy, a few best practices can ensure your plant and your aquarium remain healthy.

Do’s:

• Use Healthy Cuttings: Start with vibrant, pest-free cuttings.
• Rinse Thoroughly: Always rinse cuttings to remove any potential contaminants from the environment they came from.
• Trim Damaged Parts: Remove any yellowing leaves or mushy stems before introducing them to the tank.
• Provide Adequate Lighting: Pothos, like most plants, needs light to grow. Place your tank in an area with moderate indirect light, or use your aquarium’s LED lighting.
• Allow Roots to Reach Water: Whether submerged or emergent, ensure the plant has access to the water column for nutrient uptake.
• Monitor Water Parameters: Keep an eye on your nitrate and phosphate levels. If they drop too low, your pothos might indicate it needs a bit more available nutrients.

Don’ts:

• Don’t Use Soil Directly in the Tank: Soil particles can cloud the water and potentially introduce harmful bacteria or pathogens. Stick to sand, gravel, or specialized aquarium substrates.
• Avoid Pesticide-Treated Plants: If using a houseplant cutting, ensure it hasn’t been treated with pesticides or fertilizers that could be toxic to aquatic life. A good rinse and quarantine period can help.
• Don’t Overcrowd: While pothos is beneficial, allow sufficient space for your fish to swim freely and for good water circulation.
• Don’t Expect Instant Results: Like any plant, pothos needs time to adapt and establish itself. Be patient!

Common Pothos Aquarium Challenges and How to Solve Them

While generally trouble-free, you might encounter a few minor issues. Here’s how to tackle them.

Yellowing Leaves: What’s Wrong?

Yellowing leaves are the most common sign of distress. This can be due to a few reasons:

• Too Much Light: If leaves are pale yellow or bleached, they might be getting too much direct light. Try moving the tank or dimming your aquarium lights.
• Nutrient Deficiency: Conversely, if the leaves are yellowing and seem to be dropping off, it could indicate a lack of nutrients, particularly nitrogen or phosphorus. Ensure your fish are producing enough waste or consider a very mild, aquarium-safe liquid fertilizer if your nutrient levels are consistently zero.
• Melting (Submerged Pothos): As mentioned earlier, when first submerged, some older leaves might melt. This is a sign of adaptation. As long as new growth appears, it’s usually not a concern. Remove any truly decaying leaves.

Slow Growth: Is It Unhappy?

Slow growth can be attributed to insufficient light or low nutrient levels.

• Light: Ensure your aquarium lighting is adequate. Pothos prefers moderate light.
• Nutrients: In a well-established tank with a moderate bioload, nutrient levels might become very low, which is great for water quality but can slow plant growth. If your pothos isn’t growing at all and looks healthy otherwise, you might consider very lightly dosing an aquarium plant fertilizer, but only if you’re confident in your water parameter testing.

Algae Growth on Leaves: A Sign of Imbalance?

A little bit of algae on pothos leaves is normal, especially in a new tank. However, excessive algae can be a sign of an imbalance.

• High Light: Too much light can fuel algae growth.
• Excess Nutrients: While pothos consumes nutrients, if there are still excess nutrients (e.g., from overfeeding or infrequent water changes), algae can thrive. Ensure your feeding habits are appropriate for your fish load and perform regular water changes.
• Manual Removal: You can gently wipe algae off the leaves with a soft cloth or an old toothbrush.

Integrating Pothos with Other Aquarium Plants and Inhabitants

Pothos is incredibly versatile and plays well with others!

With Other Live Aquarium Plants

Pothos complements a wide range of aquatic plants, from carpeting plants like Dwarf Hairgrass to taller stem plants like Hornwort or Anacharis. Its presence can help balance nutrient levels, preventing nutrient spikes that could fuel algae blooms and give other plants a competitive edge.

With Fish and Shrimp

As mentioned, pothos provides excellent cover and enrichment for fish and shrimp. It’s particularly beneficial for:

• Shrimp Tanks: The root systems are ideal grazing grounds for dwarf shrimp, providing a constant source of biofilm and micro-organisms.
• Fry Tanks: Young fish will find safety and security amongst the dense foliage and roots.
• Stress Reduction: Shy or easily stressed fish will appreciate the natural camouflage.

Ensure that your chosen fish species are compatible with the presence of a plant like pothos. Generally, most community fish are perfectly fine, but avoid fish known for uprooting plants or constantly nibbling on foliage if you want your pothos to thrive.

Frequently Asked Questions About Pothos Underwater in Fish Tank

Q1: Can I put a pothos plant that was in soil directly into my fish tank?

Yes, but it’s crucial to prepare it properly. Rinse the roots and stems thoroughly to remove all soil. It’s also a good idea to quarantine the cutting in a separate bucket of dechlorinated water for a week or two, observing for any signs of pests or disease before introducing it to your main tank.

Q2: How deep should the roots of the pothos be in the water?

For partially emergent setups, the roots can dangle anywhere from a few inches to the entire depth of your tank. The more root surface area exposed to the water, the more efficient the nutrient export will be.

Q3: Will the leaves rot if they are constantly underwater?

Older leaves from a terrestrial plant might melt or decay when first submerged as they adapt. However, with time, pothos will develop new leaves that are specifically adapted to underwater life and will not rot. You can trim away any leaves that are truly decaying.

Q4: What kind of lighting does pothos need in an aquarium?

Pothos prefers moderate lighting. If your aquarium has standard LED lighting, this is usually sufficient. Avoid placing your tank in direct sunlight, which can overheat the water and promote excessive algae growth.

Q5: How often should I prune my pothos?

You can prune your pothos as needed to manage its growth and shape. Trimming the vines encourages bushier growth. You can even take the pruned cuttings and start new plants, either in your tank or in a separate jar of water to propagate.

Q6: Can pothos help with algae problems?

Absolutely! By consuming excess nitrates and phosphates, pothos helps starve out common types of algae, contributing to clearer water and a healthier balance in your aquarium ecosystem.

Conclusion: Embrace the Green Revolution!

Adding pothos to your fish tank is a simple yet incredibly effective way to enhance both its beauty and its biological filtration. Whether you opt for fully submerged vines or the popular emergent root method, you’re investing in a healthier, more vibrant aquatic environment for your beloved fish and shrimp.

Don’t be afraid to experiment and observe how your pothos thrives. With its natural resilience and impressive ability to improve water quality, pothos truly earns its place as a must-have aquatic plant for any aquarist looking to bring a touch of nature’s magic into their home. Happy planting!