Amazon Sword Care Guide: Everything You Need to Know
Amazon Swords are one of the most popular freshwater aquarium plants—and for good reason. Their broad, vibrant green leaves create a stunning focal point, they're beginner-friendly, and they thrive in a wide variety of aquarium setups.
Whether you're setting up your first planted tank or adding a statement plant to an established aquascape, this guide will help you keep your Amazon Sword healthy and thriving.
What Is an Amazon Sword?
Amazon Swords (Echinodorus species) are freshwater aquatic plants native to South America. They're known for their large, sword-shaped leaves and impressive growth, making them an excellent centerpiece plant for medium to large aquariums.
With the right care, Amazon Swords can grow over 20 inches tall, creating a lush, natural environment that fish love.
Amazon Sword Care Requirements
Lighting
Amazon Swords do best under low to medium lighting, although they'll grow faster and produce fuller leaves under moderate light.
- Low Light: Slow but healthy growth
- Medium Light: Ideal for most aquariums
- High Light: Faster growth but may require additional nutrients
Aim for 6–8 hours of light per day to encourage steady growth while helping reduce algae.
Water Parameters
One of the biggest reasons Amazon Swords are so popular is their adaptability.
Ideal Water Conditions
- Temperature: 72–82°F
- pH: 6.5–7.8
- Hardness: Soft to moderately hard water
They're forgiving plants and can tolerate a range of conditions, making them an excellent choice for beginners.
Substrate
Amazon Swords are heavy root feeders, meaning most of their nutrients come through their roots rather than the water column.
A nutrient-rich aquarium substrate is ideal, but they'll also grow well in gravel or sand when paired with root tabs.
Fertilizer
To keep your Amazon Sword growing lush and vibrant:
- Place root tabs near the base every few months.
- Dose a quality liquid fertilizer weekly to supply micronutrients.
A combination of root tabs and liquid fertilizer often produces the best results.
CO₂ Requirements
Good news—Amazon Swords do not require CO₂ injection.
They grow very well in low-tech aquariums without added CO₂. While supplemental CO₂ can increase growth and produce larger leaves, it's completely optional.
Planting Tips
When planting your Amazon Sword:
- Bury the roots securely in the substrate.
- Do not bury the crown (the point where the leaves meet the roots).
- Leave plenty of space around the plant, as it can become quite large.
Planting the crown too deeply can cause the plant to rot.
Why Are My Amazon Sword Leaves Melting?
It's common for newly purchased Amazon Swords to lose some older leaves after being introduced to a new aquarium.
This is called plant melt and is completely normal.
Many Amazon Swords are grown above water (emersed) before being shipped. Once placed underwater, they naturally replace those leaves with new submerged growth.
Simply trim away dying leaves and give the plant a few weeks to adjust.
Common Problems
Yellow Leaves
Usually caused by nutrient deficiencies, especially iron or nitrogen.
Solution:
- Add root tabs.
- Dose liquid fertilizer regularly.
Transparent or Holey Leaves
Often a sign of potassium deficiency.
Solution:
Increase fertilizer dosing and replace depleted root tabs.
Slow Growth
Possible causes include:
- Insufficient lighting
- Lack of nutrients
- Newly planted adjustment period
Most Amazon Swords begin growing steadily after they've established their root system.
Best Tank Mates
Amazon Swords pair well with many popular freshwater fish, including:
- Bettas
- Angelfish
- Tetras
- Corydoras
- Rasboras
- Gouramis
- Livebearers
- Shrimp
- Snails
Their large leaves also provide excellent shelter for shy fish and breeding species.
How Large Do Amazon Swords Get?
Depending on the variety and aquarium conditions, Amazon Swords can reach:
- Height: 12–20+ inches
- Width: 8–16 inches
Because of their size, they're best suited as a background or centerpiece plant.
Final Thoughts
Amazon Swords have earned their reputation as one of the best freshwater aquarium plants available. They're beautiful, hardy, beginner-friendly, and can transform almost any aquarium into a lush underwater landscape.
With moderate lighting, quality fertilizers, and occasional root tabs, your Amazon Sword can thrive for years and become one of the standout features of your tank.
If you're looking for an easy-to-grow plant that adds height, color, and natural beauty, it's hard to go wrong with an Amazon Sword.
At Marcus Fish Tanks, we carefully pack every Amazon Sword to help ensure it arrives healthy and ready to thrive in your aquarium. Whether you're just starting your planted tank journey or expanding an established aquascape, Amazon Swords are a timeless addition you'll enjoy for years to come.