Cryptocoryne tonkinensi is a unique, elegant aquatic plant native to northern Vietnam and southern China. Unlike traditional Cryptocoryne species that feature broad leaves, this variety stands out with its exceptionally long, thin, grass-like leaves, making it highly desirable for creating a soft, flowing texture in aquascapes.

Plant Profile & Appearance:

• Distinctive foliage: Features narrow, straw-like leaves that range from 0.3 cm to 1.3 cm in width.
• Coloration: Displays shades from bright grass-green to deep reddish-brown, depending heavily on light intensity and tank nutrients.
• Growth habit: Rosette-style, slow-growing plant that spreads via creeping underground rhizomes.
• Tank placement: Ideally suited for the foreground or midground in larger aquariums, or as a background plant in nano setups.

Aquarium Care Requirements:

This plant is relatively hardy and adaptable, making it beginner-friendly while remaining a prized item for advanced collectors.

• Water Temperature: 20°C to 28°C
• pH Range: 6.0 to 7.5
• Water Hardness: 2 to 12 dGH
• Lighting: Adapts well to low or moderate light, but can tolerate higher light to bring out richer reddish hues.
• Substrate & Nutrients: It is a heavy root feeder. It thrives best in a high-quality nutrient substrate or when boosted with root tabs.
• CO₂ Injection: Not strictly required, though it will significantly improve growth density and colour depth.

Important Aquascaping Tips:

• Avoid relocation: Like most crypts, Cryptocoryne tonkinensi dislikes being moved once planted. Keep it in a permanent spot to avoid stunting its growth.
• Expect the “Crypt Melt”: When introduced to a new aquarium or exposed to sudden parameter shifts, the plant may drop its leaves. Do not panic or throw it away; leave the root structure intact, and it will eventually grow stronger leaves acclimated to your water.