Cryptocoryne cordata

Scientific name: Cryptocoryne cordata

Family: Araceae

Usual maximum size in aquariums: 5 - 20 cm (1.97 - 7.87 inch)

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Recommended pH range for the species: 6.8 - 7.2

Recommended water hardness (dGH): 4 - 12°N (71.43 - 214.29ppm)

0°C 32°F30°C 86°F

Recommended temperature: 20 - 26 °C (68 - 78.8°F)

Reproduction of the plant: Runners

Origin (in the wild): South Asia

How fast these plants grow: Slow

Recommended substrate: Gravel

Demands on lighting: Medium

Ideal placement in a fish tank: Foreground

Family

Araceae

Origin

Cryptocoryne cordata is native to Southeast Asia, specifically found in Thailand, Malaysia, and Indonesia. It grows in slow-moving streams, shaded riverbanks, and swampy environments with nutrient-rich substrates. Due to its natural habitat, this species is well adapted to fluctuating water levels and can grow both submerged and emersed.

Ideal Placement

Foreground

Propagation

Cryptocoryne cordata propagates naturally through runners. Small plantlets develop along these runners, gradually forming their own root systems. Once they are well established, they can be separated from the parent plant and transplanted to different areas in the aquarium. Since this plant grows slowly, propagation may take some time, but once settled, it can form dense, low-growing clusters.

Growth and Maintenance

This species has a slow growth rate and thrives in gravel or nutrient-rich substrates. It benefits from root fertilizers, especially in newly planted setups. Like other Cryptocoryne species, it is prone to "Crypt Melt" when introduced to a new environment. However, with stable water parameters, the plant will recover and establish itself over time. Once settled, Cryptocoryne cordata requires minimal maintenance, making it a great choice for aquascapers.

Lighting Requirements

Moderate lighting is ideal for Cryptocoryne cordata. It naturally grows in shady stream areas, so it does not require bright light. In lower light conditions, it may develop a more elongated growth pattern, while in stronger lighting, the leaves can take on a more compact form. However, excessive light can lead to algae buildup on the leaves, so a balanced approach is recommended.

Difficulty

Easy to moderate. This plant adapts well to various water conditions, tolerating a pH range of 6.8 - 7.2 and a hardness range of 4 - 12°N. It thrives in temperatures between 20 - 26°C (68 - 78.8°F), making it suitable for most freshwater aquariums.

Short Description

Cryptocoryne cordata is a hardy foreground plant that is ideal for aquascaping due to its compact size and unique leaf shape. Unlike some other Cryptocoryne species, it does not grow too tall, making it an excellent choice for smaller tanks or as a foreground accent in larger aquariums. The leaves are typically green but may develop a reddish hue depending on lighting and water conditions. Once acclimated, it requires minimal maintenance aside from occasional trimming of yellow or damaged leaves.

Submersion and Aquascaping

This species is highly adaptable and can grow both submerged and emersed. In the wild, it is often found in swamps and seasonally flooded areas, where it grows emersed during dry periods and submerged when water levels rise. In aquariums, it thrives fully submerged, while in paludariums or ripariums, it develops thicker, more rigid leaves when grown emersed. This versatility makes it a valuable plant for both traditional and hybrid setups.

Compatibility

Cryptocoryne cordata is compatible with most freshwater fish and invertebrates. Its sturdy leaves make it less appealing to herbivorous fish, making it a great choice for planted tanks with species that might otherwise nibble on delicate plants. It also provides excellent shelter for shrimp and small fish, enhancing the natural habitat within the aquarium.

Maintenance and Care

Routine care includes removing dead or decaying leaves and ensuring stable water parameters to prevent Crypt Melt. While this plant does not require CO₂ supplementation, adding CO₂ and liquid fertilizers can enhance its growth rate and leaf coloration. A nutrient-rich substrate will also help sustain healthy root development. With proper care, Cryptocoryne cordata remains a long-lasting and visually appealing addition to any planted aquarium.