Java moss, also known as portion, can be a beautiful addition to your aquarium. Here are some care tips:

1. Lighting: Provide low to high lighting.
2. Water Parameters: Maintain neutral to slightly acidic water conditions (pH 6.0-7.5) and a temperature range of 20-28°C (68-82°F).
3. Height: Maximum height of 3-5cm.
4. Growth Rate: Slow to medium.
5. Care Level: Easy.
6. Placement: Anywhere, can be attached to driftwood or rocks.
7. Substrate: Not required, can be attached to objects in the aquarium.
8. Fertilisation: Not required, but can benefit from liquid fertilisers or root tabs.
9. Pruning: Trim the moss regularly to maintain its shape and prevent overgrowth.
10. Propagation: Easily propagates by cutting and attaching the cuttings to new surfaces.
11. Water Quality: Perform regular water changes to maintain good water quality.
12. Compatibility: Java moss is generally compatible with most fish species and shrimp.
13. CO2 Injection: Not required, but can benefit from CO2 for faster growth.
14. Algae Control: Monitor for algae growth and maintain proper balance.