Vallisneria Gigantea – Live Aquarium Plant

Introduction

Vallisneria Gigantea, also known as Giant Vallisneria, is one of the largest Vallisneria species, featuring long, ribbon-like leaves that can grow over 3 feet (90+ cm) in length. This fast-growing, low-maintenance plant is perfect for large aquariums, creating a lush, jungle-like background while providing shelter for fish. Its ability to absorb excess nutrients makes it an excellent natural filter, helping maintain water quality and reduce algae growth.

Origin

Native to Asia and Australia, Vallisneria Gigantea thrives in slow-moving waters, lakes, and rivers, where it grows in submerged conditions with moderate to high lighting.

Scientific Name

Vallisneria gigantea

Lighting Requirements

• Moderate to high lighting is ideal for best growth.
• Under higher light, leaves grow faster and healthier, forming a dense aquatic forest.
• 8-12 hours of light per day helps maintain its vibrant green color.

Care Level

Easy – Vallisneria Gigantea is a hardy, beginner-friendly plant that requires minimal care. It adapts well to various water conditions, making it an excellent choice for most freshwater aquariums.

Preferred Water Parameters

• Temperature: 20-28°C (68-82°F)
• pH: 6.5-8.0
• Hardness: 4-15 dGH
  This plant thrives in soft to moderately hard water, tolerating a wide range of conditions.

Placement

• Background plant – Due to its tall, flowing leaves, Vallisneria Gigantea is best placed in the background of an aquarium.
• It can also be positioned along the sides of larger tanks to create a natural aquatic wall.

Growth Rate

Fast – This plant spreads quickly through runners, forming a dense, grass-like forest. Regular trimming may be necessary to prevent overgrowth.

CO2 and Fertilizer

• CO2 injection is not required, but it can boost growth.
• Liquid fertilizers rich in iron and potassium promote healthy leaf development.
• Root tabs can provide additional nutrients if planted in low-nutrient substrates.

Potential Problems

• Melting leaves – Newly planted Vallisneria may melt initially but will regrow once adjusted.
• Slow growth in low-light or low-nutrient conditions.
• Overgrowth – Its fast propagation may require occasional thinning.

Compatible Fishes

• Tetras, Rasboras, and Guppies – Love swimming through the long leaves.
• Angelfish and Gouramis – Enjoy the natural shelter it provides.
• Corydoras and Loaches – Benefit from the shade and hiding spots.

Other Suitable Plants

• Amazon Sword – Complements Vallisneria with its broad, sturdy leaves.
• Anubias – Adds contrast in midground placements.
• Cryptocoryne species – Provides textural diversity in the aquascape.

Tropical or Cold Water?

Tropical. Vallisneria Gigantea prefers warm water but can tolerate slightly cooler temperatures down to 20°C (68°F).

What Fish Can Eat It?

• Goldfish and Silver Dollars may nibble on its leaves.
• Herbivorous Plecos might graze on older leaves but generally leave it alone.
• Most community fish do not eat Vallisneria, making it a great plant for planted tanks.

A Fun Fact

Vallisneria Gigantea is often used in biotope aquariums to recreate natural river and lake environments. Its long, waving leaves mimic submerged grasslands, providing a realistic and visually stunning aquascape.