Each tub usually contains many individual small plants which presents great value.

These are tissue-cultured aquatic plants. 

__________________

Cryptocoryne crispatula 'Tonkinensis' is an aquatic plant native to Southeast Asia, primarily found in the slow-moving streams and rivers of Vietnam. Known for its elegant, elongated leaves and adaptability, this species has become popular in aquascaping, especially for hobbyists seeking to create natural, low-maintenance environments. Below, we will explore its appearance, care requirements, suitability for low-tech aquariums, and best placements within an aquascape.

Cryptocoryne crispatula 'Tonkinensis' is known for its distinct long, ribbon-like leaves that grow from a central rosette. These leaves can reach lengths of up to 40 cm, making it ideal for taller tanks. The leaf blades are narrow, typically between 0.5 and 2 cm (0.2 to 0.8 inches) wide, giving the plant a graceful, wispy appearance. The leaves' color varies depending on the growing conditions, typically ranging from a bright, fresh green to a darker, olive hue.

One of the most defining characteristics of Cryptocoryne crispatula 'Tonkinensis' is the slightly wavy (or “crispy”) edges of the leaves, which create texture and visual interest in the aquarium. The plant’s root system is robust, ensuring that it remains securely anchored in the substrate. Cryptocoryne crispatula 'Tonkinensis' typically exhibits a slow to moderate growth rate, meaning it won’t take over the tank quickly, but will instead provide steady growth over time, contributing to long-term aquascape stability.

Suitability in Low-Tech Tanks Cryptocoryne crispatula 'Tonkinensis' is particularly well-suited for low-tech aquariums, making it an excellent choice for aquarists who prefer simpler setups without CO2 injection or intense lighting systems. The plant’s slow growth rate under low-light conditions means it requires less frequent maintenance compared to faster-growing species, reducing the need for trimming or repositioning. Even in the absence of CO2, Cryptocoryne crispatula 'Tonkinensis' remains a viable option for aquascapes because of its ability to adapt to different lighting and nutrient conditions. When placed in a low-tech environment with moderate lighting (around 0.5 to 1 watt per liter), it will establish itself over time and grow steadily. While the plant will grow faster and potentially more robust in high-tech setups with CO2 and brighter lighting, the ability of Cryptocoryne crispatula 'Tonkinensis' to tolerate low-tech environments makes it a favorite for hobbyists seeking to create lush aquascapes without complex technology.

Placement in the Aquascape Cryptocoryne crispatula 'Tonkinensis' is a versatile plant that works well in various positions within an aquarium. Its long, ribbon-like leaves make it particularly suited for background and midground planting, depending on the size of the tank. 

The long leaves will grow upwards and sway gently in the current, creating a natural, river-like aesthetic. Its height can help mask unsightly equipment such as heaters or filters, while still allowing light to penetrate to plants in the midground and foreground.

Cryptocoryne crispatula 'Tonkinensis' is often praised for its hardiness and adaptability, making it suitable for both beginner and experienced aquarists. It is a relatively undemanding plant, thriving in a variety of water conditions.

Lighting: This plant prefers moderate to high lighting, though it can tolerate lower light levels typical of low-tech aquariums. Under lower light, the growth rate will slow, and the leaves may become darker in color. In brighter conditions, the plant will grow more vigorously, and the leaves may develop more of their characteristic wavy texture.

As with many Cryptocoryne species, sudden changes in water chemistry, lighting, or temperature may result in "Crypt melt," where the leaves die off quickly. Fortunately, this is usually temporary, and the plant will regrow once it adjusts to the new conditions. Fertilization and CO2: Although Cryptocoryne crispatula 'Tonkinensis' does not require CO2 supplementation, it will benefit from it, especially in a high-tech setup with brighter lighting. In low-tech aquariums, CO2 is not necessary, and the plant will still thrive, albeit at a slower growth rate.

Regular dosing of liquid fertilizers, particularly those containing iron and potassium, will enhance leaf coloration and health. However, even without these supplements, the plant can sustain itself with nutrients drawn from the substrate.


__________________

Advantage: Pest and snail-free. Each tub has many individual small plants.
Disadvantage: Some melting usually occurs when transitioning from tissue culture state to aquarium conditions.

(Information written by Aquarzon based on actual growing experience, observations and research. Please do not copy any information or photos) 

Growth Speed   : Slow-Medium
Difficulty Level   : Easy-Medium
Temperature      : 10-30°C
PH Range          : 5.5-7.8
Min. Light Needs: Low-Medium         
Origin                 : Thailand, Southeast Asia