Houseplants That Can Grow in an Aquarium (And Help Keep It Clean)
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If you love both aquariums and indoor plants, here’s some great news: certain houseplants can thrive in a fish tank! These plants don’t just add beauty—they can naturally filter your water, reduce algae, and give your fish a healthier home.
In this guide, we’ll share six houseplants you can grow in an aquarium, how to set them up, and tips to keep them healthy long-term.
Why Grow Houseplants in a Fish Tank?
Houseplants that grow in water have a unique advantage: their root systems act as natural aquarium filters. They absorb nitrates, ammonia, and other compounds that can harm your fish if they build up over time.
Some benefits include:
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Cleaner water with fewer toxins
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Less algae growth thanks to nutrient absorption
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More oxygen for your fish
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Extra shelter from dangling roots
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A beautiful natural display that combines aquascaping and indoor gardening
6 Best Houseplants for Aquariums
1. Pothos (Epipremnum aureum)
One of the most popular aquarium-friendly plants, pothos thrives when its roots are submerged. Its vines can trail outside the tank, giving a lush, tropical look. Just keep the leaves above water to avoid rot.
Benefits: Fast growth, strong water filtration, easy to care for.
2. Peace Lily (Spathiphyllum)
With its glossy leaves and white blooms, the peace lily is both decorative and functional. It’s often grown with its roots in water and crown above the surface.
Benefits: Removes toxins, adds elegance, easy hydroponic adaptation.
3. Lucky Bamboo (Dracaena sanderiana)
A symbol of good luck, lucky bamboo looks great in aquariums. Keep its stalks partially submerged with leaves in open air.
Benefits: Low maintenance, upright structure, unique look.
4. Spider Plant (Chlorophytum comosum)
While not fully aquatic, spider plants can live with roots in water for long periods. They even produce small “baby” plants that can be propagated.
Benefits: Easy to grow, fun offshoots, fish root cover.
5. Heartleaf Philodendron (Philodendron hederaceum)
A fast-growing vining plant, philodendron adapts quickly to aquarium conditions. Its roots help keep water balanced, while its leaves add tropical charm.
Benefits: Forgiving care needs, fast rooting, lush growth.
6. Monstera Adansonii (Swiss Cheese Vine)
For a dramatic look, try monstera adansonii. While less common in aquariums, it can thrive if roots are submerged and leaves stay above water.
Benefits: Unique foliage, striking display, easy propagation.
How to Set Up Houseplants in an Aquarium
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Rinse roots thoroughly to remove soil and prevent contamination.
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Keep leaves dry—most houseplants will rot if submerged fully.
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Use holders or suction cups to keep plants in place at the waterline.
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Provide light—standard aquarium LEDs work well for most plants.
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Trim regularly to manage growth.
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Watch for fish that may nibble on roots.
Frequently Asked Questions About Houseplants in Aquariums
1. Can any houseplant grow in an aquarium?
No. Most houseplants will rot if fully submerged. The plants listed here are semi-aquatic or water-tolerant and should be placed with roots in water and leaves above the surface.
2. Do plants in aquariums help keep the water clean?
Yes. Aquarium-friendly houseplants absorb nitrates, ammonia, and other waste compounds, helping to keep water clearer and reducing algae growth.
3. Can I put pothos in a fish tank?
Absolutely. Pothos is one of the best plants for aquariums because it grows quickly and removes harmful toxins from the water. Just make sure the leaves are above water to prevent rot.
4. Are aquarium houseplants safe for all fish?
In most cases, yes. However, goldfish and some cichlids may nibble on plant roots. Keep an eye on your fish to ensure the plants aren’t being damaged.
5. Do I need special lighting for houseplants in aquariums?
Most of these plants grow well under standard aquarium LED lighting. If your tank is in a dim room, you may need an additional plant light to encourage healthy growth.
6. How do I stop my plants from floating away?
Use plant holders, suction cups, or mesh baskets to keep roots in place and prevent the plant from drifting around the tank.
7. Can these plants replace a filter?
No. While they help with water quality, plants should not replace your aquarium filter. They are best used as a supplement to regular tank maintenance.
Final Thoughts
Adding houseplants to your aquarium creates a stunning, healthy environment for both plants and fish. With proper setup, these plants will grow strong, clean your water, and make your tank look incredible.
For more indoor plant care tips and creative aquarium ideas, follow GardenWrld on YouTube and Instagram. Your next aquarium project might just be the greenest one yet!