Eleocharis acicularis, also known as dwarf hairgrass, can be a beautiful addition to your aquarium. Here are some care tips:

1. Lighting: Provide moderate to high lighting.
2. Water Parameters: Maintain slightly acidic to neutral water conditions (pH 6.0-7.5) and a temperature range of 18-28°C (65-82°F).
3. Height: Maximum height of 10cm.
4. Growth Rate: Medium to fast.
5. Care Level: Easy.
6. Placement: Foreground.
7. Substrate: Use nutrient-rich substrate like aquarium soil or sand.
8. Fertilisation: Regularly fertilise with liquid fertilisers or root tabs.
9. Pruning: Trim the plant regularly to maintain its shape and prevent overgrowth.
10. Propagation: Divide the plant by separating the runners and replanting them.
11. Water Quality: Perform regular water changes to maintain good water quality.
12. Compatibility: Eleocharis acicularis is generally compatible with most fish species.
13. CO2 Injection: Consider CO2 injection for faster growth and better health.
14. Algae Control: Monitor for algae growth and maintain proper balance.