Hygrophila sp. 'Araguaia' is an aquatic plant popular among aquarists for its attractive, reddish-brown foliage and compact growth pattern. It is named after the Araguaia River in Brazil, where it is believed to originate. This plant is well-suited for midground or foreground placement in planted aquariums.

Here are some key points about Hygrophila sp. 'Araguaia':

1. Appearance: *Hygrophila sp. 'Araguaia'* features narrow, lance-shaped leaves that can range in color from green to reddish-brown, depending on the lighting and nutrient levels. The plant typically grows in a bushy, compact form.

2. Lighting: High lighting is recommended to maintain the plant's vibrant coloration and encourage dense growth. Under low light, the plant may lose its red tones and grow more sparsely.

3. Water Conditions: This plant thrives in a range of water conditions but prefers slightly acidic to neutral pH levels (6.0-7.5) and temperatures between 72-82°F (22-28°C).

4. Nutrients: Regular supplementation of nutrients, particularly iron, will help maintain the plant’s health and coloration. CO₂ injection is beneficial and can promote faster growth and more intense coloration, although it is not absolutely necessary.

5. Propagation: *Hygrophila sp. 'Araguaia'* can be propagated by cutting the stems and replanting them in the substrate. The cuttings will develop roots and grow into new plants.

6. Placement: Due to its compact growth habit, *Hygrophila sp. 'Araguaia'* is ideal for midground or foreground placement in an aquarium. Regular trimming is required to maintain its shape and prevent it from becoming too leggy.

7. Compatibility: This plant is compatible with most freshwater fish and invertebrates. It can be used in both low-tech and high-tech planted aquariums, making it versatile for different setups.

8. Care Level: It is considered moderately easy to care for, making it suitable for aquarists with some experience in maintaining aquatic plants.

If you have more specific questions or need additional details about *Hygrophila sp. 'Araguaia'*, feel free to ask!