10 Recommended Aquatic Plants That Grow Without CO2

Enjoy a Beautiful Aquatic Plant Tank Without CO2 Supplementation

When people first consider setting up an aquatic plant tank, many find themselves worried about installing a "CO2 addition system." It's true that adding CO2 accelerates plant growth dramatically, but the equipment costs thousands to tens of thousands of yen, and maintaining CO2 cylinders and regulators becomes necessary. For beginners, it's understandable to find this a daunting hurdle.

But don't worry. In nature, there are countless aquatic plants with high photosynthetic ability that thrive on the minimal CO2 dissolved naturally in water. By choosing the right species, you can create a lush and beautiful aquatic plant tank without any CO2 equipment at all. This article details 10 recommended CO2-free aquatic plants that are easy to cultivate and explains important management tips to ensure success.

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Common Characteristics of Aquatic Plants That Grow Without CO2

Aquatic plants that can be grown without CO2 supplementation share several common traits. Understanding these will help you select new species in the future.

Low light requirements Many are classified as "shade-loving aquatic plants" and grow well without intense lighting. Standard aquarium LED lights or fluorescent fixtures are sufficient. They adapt easily to indoor environments where direct sunlight is limited, which is a key characteristic.

Slower growth rate While slow growth means they're more prone to algae coverage, the upside is that trimming is less frequent and maintenance is easier. For busy people and beginners, this is a significant advantage.

Wide water condition tolerance Most species tolerate minor temperature fluctuations and water quality changes, so they won't easily die even if water changes become less frequent. Even those growing aquatic plants for the first time can work with them confidently.

Many have attachment ability Most include "attachment plants" that root onto driftwood or stones. Since there's no need to plant them in substrate, you don't have to worry about choosing the right soil.

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10 Recommended CO2-Free Aquatic Plants

1. Anubias Nana The quintessential shade-loving aquatic plant. Its round, glossy, deep green leaves are beautiful and grow well even under extremely low light. It's typically attached to driftwood or stone and is popular as an accent in the midground or foreground of a tank. Growth is very slow, and keeping Yamato shrimp in the same tank helps manage algae on the leaves.

2. Microsorum (Microsorum Pteropus) A fern relative with distinctive long, narrow leaves that give the tank a natural atmosphere. It excels at attaching to driftwood, with many varieties like "Narrow Leaf," "Trident," and "Windlov" available. Along with Anubias, it's a standard shade-loving plant.

3. Willow Moss A type of moss with fine, overlapping leaves. When wrapped around driftwood or stones, it will gradually attach completely. Hardy and vigorous, it's essential for moss-scape layouts in aquariums and also serves as a hiding place for shrimp.

4. Cryptocoryne (Crypto) A rosette-type plant that roots into substrate, with its subdued leaf colors standing out in the midground. Immediately after purchase, the leaves may appear to dissolve temporarily—a condition called "crypto melt"—but if the roots remain, it will recover as it adjusts to its environment. Once established, it's extremely hardy and suited for long-term cultivation.

5. Bucephalandra A shade-loving aquatic plant native to Southeast Asia and Borneo, with many varieties showing iridescent rainbow shimmer on the leaf surface, making it a highly collectible species. It's grown similarly to Anubias, with driftwood attachment as the standard method. Growth is slow, but this allows you to enjoy a beautiful layout at a relaxed pace.

6. Amazon Sword A large rosette plant native to South America, widely used as a background plant. CO2 is not required, but since it produces vigorous roots, root fertilizers (solid fertilizer inserted at the base) are effective. Its broad leaves provide volume and visual presence, making it capable of being the centerpiece of your tank.

7. Vallisneria A background plant with long, tape-like leaves that sway beautifully in the current. It spreads horizontally by producing runners and naturally forms dense colonies. Relatively easy to manage and affordable, making it ideal for beginners.

8. Hornwort (Coontail) A stem plant that grows when simply left floating or suspended in the water. It grows vigorously even without CO2 and provides water purification by absorbing excess nutrients from the tank. It pairs particularly well with goldfish tanks and is attractive for being inexpensive and readily available.

9. Java Fern A shade-tolerant fern similar to Microsorum with thick, strong leaves and attachment ability. It pairs exceptionally well with driftwood layouts and integrates easily into natural or wild-style aquascapes. It increases by producing plantlets at leaf tips, adding the enjoyment of watching propagation.

10. Floating Plants (Water Sprite, Salvinia, Frogbit) The greatest appeal is the ease of care—simply float them on the water surface without substrate or rooting. With sufficient light, they multiply dramatically and effectively absorb nitrates and phosphates from the water. They're a useful tool for those struggling to maintain water quality in densely stocked tanks.

CO2-Free Aquatic Plants at a Glance

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Management Tips for Success

Even with CO2-free plants, there are basic points to keep in mind.

Manage lighting time and intensity Set lighting for about 8–10 hours daily. Too long creates algae problems, while too little weakens the plants. Using a timer outlet makes automated control easy. CO2-free plants need less light, but complete darkness won't work.

Make good use of liquid fertilizer While CO2 is unnecessary, plants still need nitrogen, phosphorus, potassium, and trace elements. Especially in tanks with few fish or very low bioload, adding a small amount of liquid fertilizer 1–2 times weekly stabilizes growth. Avoid overdosing, as it promotes algae—follow the instructions carefully.

Regular water changes to reset water conditions Perform water changes of about 20–30% of tank volume weekly to remove accumulated organic matter and nitrates. When plants aren't doing well, increasing water change frequency often helps.

Don't forget algae control Since shade-loving plants grow slowly, algae tends to accumulate on leaves. Introducing algae-eating creatures like Yamato shrimp or Otocinclus keeps leaves clean. Adjusting lighting direction and duration also helps.

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Benefits of Purchasing Aquatic Plants from Botachoku

At Botachoku, you can purchase aquatic plants directly from specialized growers and vendors. Unlike general home improvement stores or online retailers, there are several significant advantages.

Lower pesticide risk Imported aquatic plants often carry pesticide residue, causing trouble when shrimp and other crustaceans die. Plants listed on Botachoku include pesticide treatment information, allowing you to choose pesticide-free or pesticide-removed options. This is especially reassuring for those who want to keep plants and shrimp together.

Access to rare varieties like Bucephalandra Rare Bucephalandra varieties rarely seen in general distribution, as well as specific Cryptocoryne and Anubias variants, can be found through our specialist grower lineup. Perfect for collectors and those aiming for particular layouts.

Get advice on care after purchase Botachoku allows buyers and growers to communicate via messaging. Questions like "the leaves are dissolving after arrival" or "it won't attach" can be asked directly to the grower, giving even beginners confidence to grow plants successfully.

You can enjoy aquatic plant layouts without a CO2 system. Start with hardy shade-loving plants and experience the joy of aquatic plant cultivation.