Stoffels Cryptocoryne tonkinensis (Tissue Culture)

Cryptocoryne tonkinensis is a slender, grass-like species of Crypt, offering a unique and delicate look that sets it apart from the broader-leaved varieties commonly found in planted tanks. Its narrow, strap-like leaves grow in graceful tufts that range from light to medium green, with a soft, flowing texture that sways naturally in the current.

This tissue culture version is grown in a sterile lab environment, free from algae, pests, and snails—perfect for introducing into new setups or for aquascapers who demand clean, healthy starts.

Ideal for aquascapers seeking a lighter, finer texture in foreground and midground areas, C. tonkinensis adds a natural, grassland feel to layouts—especially in low-tech biotopes or nature-style aquascapes.

How to Use in the Aquarium

Cryptocoryne tonkinensis is a root-feeding rosette plant, best planted directly into nutrient-rich substrate. It forms small clusters that slowly expand over time, making it suitable for:

• Foreground to low midground planting zones

• Natural-style scapes where a wild, meadow-like look is desired

• Border transitions between hardscape and other crypts

• Tanks with gentle flow and stable water parameters

Tissue culture cups can be rinsed and divided into small portions for spacing and quicker carpet formation.

Maintenance

Like most Crypts, C. tonkinensis is undemanding, but it does best in stable environments with soft to moderately hard water.

• Lighting: Low to medium (strong light can cause slight reddish hues)

• CO₂: Not required but can help establish faster

• Fertilisation: Prefers nutrient-rich substrate or root tabs

• Growth Rate: Moderate once established

• Crypt Melt: May occur if there are drastic parameter changes—be patient, it will regrow

Emersed Growth

Cryptocoryne tonkinensis also grows well emersed and is suitable for high-humidity terrariums, paludariums, or Wabi-Kusa setups.

In emersed conditions:

• Leaves become shorter, stiffer, and slightly thicker

• Plant retains its grass-like form

• Grows well in humid, well-lit setups with consistent moisture

• Flowering may occur in mature emersed setups

Tissue culture plants adapt easily to both submerged and emersed conditions.

Growth Information

• Type: Rosette, root-feeding

• Light: Low to medium

• CO₂: Optional

• Growth Rate: Moderate

• Placement: Foreground to Midground

• Difficulty: Easy

• Origin: Vietnam (Tonkin region)

• Format: Sterile Tissue Culture Cup (pest-free, algae-free)