Microsorium narrow leaf, also known as narrow leaf java fern, can be a beautiful addition to your aquarium. Here are some care tips:

1. Lighting: Provide moderate to low 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 20cm.
4. Growth Rate: Slow.
5. Care Level: Easy.
6. Placement: Background.
7. Substrate: Can be attached to driftwood or rocks, or planted in substrate.
8. Fertilisation: Can benefit from occasional liquid fertilisation.
9. Pruning: Trim the plant regularly to remove old or yellowing leaves.
10. Propagation: Can be propagated by dividing the rhizome or by planting daughter plants that form on the leaves.
11. Water Quality: Perform regular water changes to maintain good water quality.
12. Compatibility: Microsorium narrow leaf is generally compatible with most fish species.
13. CO2 Injection: Not necessary, but can promote faster growth.
14. Algae Control: Monitor for algae growth and maintain proper balance.