10 Beginner Aquatic Plants That Grow Without CO2 — Easy Species & Care Tips

Why Beginners Fail at Growing Aquatic Plants and Choosing Non-CO2 Options

Many people who start growing aquatic plants experience "they died quickly" or "they melted away." The main causes of failure are "insufficient light," "CO2 deficiency," and "nutrient deficiency," but investing in CO2 injection equipment from the start can be expensive.

We recommend beginners start with "hardy species that grow even without CO2 injection." Once you experience the joy of cultivation, you can gradually enhance your equipment.

10 Easy-to-Grow Aquatic Plants Without CO2

1. Anacharis (Giant Water Weed)

Characteristics: A hardy stem plant standard in goldfish tanks. It grows even with low light and is resistant to temperature and water quality changes. Highly prolific and easy to propagate.

Light requirement: Low to Medium

2. Willow Moss

Characteristics: A standard moss that attaches to driftwood and rocks. It grows even without CO2 and provides hiding places for young fish. Perfect as a green accent in layouts.

Light requirement: Low to Medium

3. Amazon Sword (Echinodorus)

Characteristics: A large rosette-type aquatic plant. Beautiful leaves that serve as a background focal point. Primarily absorbs nutrients through roots, so substrate nutrients are important.

Light requirement: Medium to High

4. Anubias Nana

Characteristics: A hardy shade-loving plant that attaches easily. It tolerates low light and areas without direct sunlight. Growth is slow, but long-term maintenance is easy. The downside is that algae readily attaches to it.

Light requirement: Low

5. Microsorum

Characteristics: A shade-loving fern-type plant that attaches. When attached to driftwood, it creates a natural-looking layout. Extremely hardy and easy to maintain.

Light requirement: Low to Medium

6. Vallisneria

Characteristics: A stem plant with tape-like leaves that sway in water current. Fast-growing and thrives with substrate fertilizer. Spreads via runners, so management is necessary.

Light requirement: Medium

7. Ludwigia Palustris

Characteristics: A relatively hardy stem plant with reddish leaves. The higher the light, the more red coloration appears. Grows without CO2 but grows faster with CO2 injection.

Light requirement: Medium to High

8. Green Rotala

Characteristics: A stem plant for background placement with densely packed fine leaves. Grows without CO2 but tends to become thin with insufficient light.

Light requirement: Medium to High

9. Hairgrass (Eleocharis)

Characteristics: A carpet-type aquatic plant with thin, grass-like leaves. Growth is slow without CO2 but cultivation is possible. Ideal for creating carpets in the foreground.

Light requirement: Medium to High

10. Pygmy Chain Sword

Characteristics: A foreground plant that spreads via small runners. Hardy and grows with medium light.

Light requirement: Medium

Summary

For your first aquatic plants, prioritize "hardiness" when selecting. You can create a beautiful layout by combining just three species: Anacharis, Willow Moss, and Anubias Nana. Once you become comfortable with cultivation, you can gradually challenge yourself with plants that have higher requirements.