Hygrophila polysperma

Hygrophila polysperma is a fast-growing aquatic plant that is popular among aquarists for its hardiness and attractive appearance. Here’s how to care for Hygrophila polysperma in your aquarium:

Lighting

• Moderate to High Lighting: While Hygrophila polysperma can tolerate low light, it grows best under moderate to high lighting conditions. Adequate light promotes denser growth and vibrant coloration.

Water Parameters

• Temperature: 20-28°C is ideal. It can tolerate a range of temperatures but thrives in the mid-20s (degrees celsius).
• pH: 6.0 to 8.0. It adapts well to slightly acidic to neutral water conditions.
• Water Hardness: Soft to moderately hard water (3-15 dGH) is preferred.

Substrate

• Nutrient-Rich Substrate: Hygrophila polysperma grows well in a variety of substrates but benefits from a nutrient-rich substrate like aquasoil or fine gravel. This helps provide essential nutrients for robust growth.
• Root Tabs: If using inert substrate, consider adding root tabs to supply nutrients directly to the roots.

CO2 and Fertilization

• CO2: CO2 injection is not necessary but can enhance growth and promote bushier foliage. The plant can thrive without it in low-tech setups.
• Fertilization: Regular dosing of liquid fertilizers, particularly those containing nitrogen, potassium, and micronutrients, will encourage healthy growth and vibrant color.

Growth and Maintenance

• Growth Rate: Hygrophila polysperma is a very fast-growing plant and can reach heights of 30-50 cm (12-20 inches) or more if conditions are optimal.
• Pruning: Regular trimming is essential to maintain its shape and prevent it from overshadowing smaller plants. Trim back excessive height and side shoots to encourage bushier growth.

Placement in Aquarium

• Midground to Background Plant: Due to its height, Hygrophila polysperma is best suited for the midground or background of the aquarium. It can provide a lush backdrop for smaller foreground plants.

Propagation

• Cuttings: The plant propagates easily through stem cuttings. Simply cut a healthy stem below a node and replant it in the substrate. New roots will develop, leading to more plants.

Water Flow and Circulation

• Moderate Water Flow: Moderate water flow is beneficial to prevent debris from accumulating on the leaves and to promote healthy growth.

Algae Control

• Algae Prevention: To minimize algae growth, maintain good water quality, balance light and nutrient levels, and perform regular water changes. Avoid excessive light duration to help prevent algae buildup.

Compatibility

• Community Tank Friendly: Hygrophila polysperma is generally compatible with most fish and invertebrate species. However, be cautious with herbivorous fish that might nibble on its leaves.

With proper care, Hygrophila polysperma will flourish and add a lush, vibrant green appearance to your aquarium, making it an excellent choice for both beginners and experienced aquarists alike.

An interesting fact about Hygrophila polysperma is that it is often used as a natural means of controlling algae in aquariums. Its fast growth rate allows it to outcompete algae for nutrients and light, helping to keep algae levels in check. This characteristic makes it particularly beneficial in newly established tanks or in setups where nutrient levels might fluctuate. Additionally, Hygrophila polysperma can adapt to a variety of conditions, including a range of light levels and water parameters, making it one of the most versatile and resilient aquatic plants in the hobby. Its ability to thrive in diverse environments also means it can flourish in both low-tech and high-tech aquariums.