Cryptocoryne undulata is a popular and hardy aquatic plant in the Cryptocoryne genus, widely used in freshwater aquariums for its textured, wavy leaves and adaptability. Here’s a detailed description:

General Description

• Type: Submerged aquatic plant

• Origin: Southeast Asia (commonly found in Sri Lanka)

• Size: Small to medium; typically 10–20 cm (4–8 inches) tall, though leaves may grow slightly longer under ideal conditions

• Leaves:

  • Shape: Lanceolate with pronounced wavy or undulating edges (hence the name “undulata”)

  • Color: Medium to dark green; may develop reddish-brown tones under lower light or certain conditions

  • Texture: Soft yet sturdy, slightly glossy

  • Arrangement: Rosette form, with new leaves growing from a central crown

Aquarium Care

• Lighting: Low to moderate; very adaptable, making it suitable for low-light aquariums

• Substrate: Nutrient-rich substrate preferred; absorbs nutrients through roots

• CO₂ and Fertilization: Optional; will grow without CO₂ but benefits from liquid fertilizers for denser growth

• Temperature: 22–28°C (72–82°F)

• Water Parameters: Soft to moderately hard water, pH 6.0–7.5

• Special Notes: Like other Cryptocorynes, may undergo “Crypt melt” when first introduced to a new tank but recovers over time

Uses in Aquascaping

• Ideal for foreground or midground planting due to its compact size

• Adds texture and depth to the aquarium with its wavy leaves

• Forms dense clumps, providing hiding spots for shrimp, fry, and small fish

• Slow to moderate growth; leaves can be trimmed to maintain a tidy appearance