Riccia in 80cc cup, also known as crystalwort, 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 1-3cm.
4. Growth Rate: Fast.
5. Care Level: Easy.
6. Placement: Floating or attached to rocks or driftwood.
7. Substrate: Not required, but can be attached to mesh or rocks.
8. Fertilisation: Not required, but can benefit from liquid fertilisers or CO2 injection.
9. Pruning: Trim the plant regularly to maintain its shape and prevent overgrowth.
10. Propagation: Riccia can be propagated by dividing or separating the plant into smaller portions.
11. Water Quality: Perform regular water changes to maintain good water quality.
12. Compatibility: Riccia 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.