Appearance: Rotala rotundifolia, also known as Roundleaf Toothcup, is a popular aquarium plant with slender stems and small, round leaves. The leaves are typically green in color, but under higher light conditions, they can develop shades of red or pink. The plant can grow to a height of 20-50 cm (8-20 inches) in the aquarium.

Growth: TCulture Rotala Rotundifolia has a moderate to fast growth rate, making it suitable for creating dense backgrounds or midground displays in the aquarium. With proper care and favorable conditions, it can form a vibrant and bushy appearance. Regular pruning and trimming are necessary to control its growth and maintain its shape.

Lighting and CO2 Requirements: Rotala rotundifolia requires moderate to high lighting levels for optimal growth and coloration. Providing around 2 to 3 watts per gallon (or 0.5 to 0.8 watts per liter) of light is recommended. While it can grow without additional carbon dioxide (CO2) supplementation, providing a reliable source of CO2 will enhance its growth and overall health.

Water Parameters: The ideal water parameters for Rotala rotundifolia are as follows:

• Temperature: 68-82°F (20-28°C)
• pH: 5.0-7.5
• Hardness: Soft to moderately hard water (2-15 dKH)

Nutrient Requirements: Rotala rotundifolia benefits from a nutrient-rich environment. Providing a nutrient-rich substrate or using root tabs can support its growth and provide essential nutrients. Regular dosing of liquid fertilizers containing macronutrients and micronutrients will further support its growth and overall health.

Placement and Propagation: Rotala rotundifolia is commonly used as a background or midground plant in aquariums due to its height and bushy growth habit. It can be planted individually or in small groups to create a visually appealing display. Propagation can be achieved by taking stem cuttings and replanting them in the substrate. The cuttings will develop roots and continue to grow, gradually forming dense clusters.