Low-Tech No-CO2 Aquatic Plant Guide — Creating Beautiful Layouts Without High-Tech Equipment
Guide to growing aquatic plants without CO2: selecting low-light tolerant species, managing nutrients, and creating beautiful layouts with Elodea, Anubias, Java Fern, and Willow Moss.
Key Takeaways
Guide to growing aquatic plants without CO2: selecting low-light tolerant species, managing nutrients, and creating beautiful layouts with Elodea, Anubias, Java Fern, and Willow Moss.
Related Species
Beautiful Aquatic Plant Tanks Without CO2
Many people have the impression that aquatic plant tanks require CO2 and are difficult to maintain. It's true that CO2 injection is necessary to create carpet-like foreground plants like Glossostigma. However, it is entirely possible to create a beautiful aquatic plant tank even without CO2 and with low light.
A low-tech tank is a tank style centered around hardy aquatic plants that can grow with no CO2 injection and low lighting. Since management is simple and costs are kept down, it is especially suitable for beginners and busy people.
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Standard Aquatic Plants That Grow Without CO2
Anacharis (Elodea canadensis)
One of the easiest types of aquatic plants to grow. It grows vigorously even with low light and no CO2. With extremely fast growth and strong nutrient absorption, it's also effective at suppressing algae. It pairs well with goldfish and medaka, and can be easily propagated by simply cutting and replanting.
Microsorum
The representative of fern-type aquatic plants. It has hard, durable leaves and high adaptability to water conditions. By attaching it to driftwood or rocks, you can create a natural aquascape. It thrives in dark environments, and while growth is slow, once rooted, it remains stable long-term. Fix it to driftwood with cotton thread or plant ties, and roots will take hold in a few weeks.
Anubias Nana
A hardy arum family aquatic plant native to West Africa. It's an excellent plant that grows even in low-light environments. With thick leaves and strong resistance to algae and fish damage, it's used similarly to Microsorum by attaching it to driftwood or rocks. If you bury the rhizome in the substrate, it will rot, so always use the attachment method.
Water Wisteria
A mid-to-background plant with beautiful feathery leaves. Among aquatic plants that grow well without CO2, this variety is particularly attractive. With fast growth and ease of use as a background plant, it can be easily propagated by cutting stems.
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How to Set Up a Low-Tech Tank
Choosing a Substrate
For low-tech tanks, it's often easier to manage with adsorption-type soil or gravel. Nutrient-rich soil sometimes has too much initial nutrition, which can promote algae growth. Aragonite sand or colorful gravel pair well with plants like Anacharis.
Lighting Selection
Aquatic plants suitable for low-tech setups grow under weak light, but proper lighting is still necessary. For a 60cm tank, aim for 10-20W of LED, with lighting on for 6-8 hours per day. You don't need expensive aquatic plant lighting—standard aquarium LEDs will support adequate growth.
Filters and Water Quality
Even low-tech tanks require basic filtration. External filters are ideal, but undergravel filters or hang-on filters work just fine.
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Maintaining a Low-Tech Tank
Perform about 30% water changes once a week. Low-tech tanks don't require as frequent management as high-light, CO2-injected tanks, and can sometimes be maintained with water changes only once every two weeks. To control algae naturally, add algae-eating organisms like Yamato amano shrimp, dwarf amano shrimp, or plecos.
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Buy Medaka and Shrimp Together on Botachoku
On Botachoku, you can purchase medaka and freshwater shrimp that pair well with aquatic plants directly from growers. You can get specific advice like "I'm using plants that suit a non-CO2 tank—what shrimp would be a good match?" Enjoy a natural aquascape in a low-tech tank while also experiencing the pleasure of coexisting with aquatic creatures.