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Riccia
Riccia fluitans
Family: Ricciaceae
A floating liverwort made famous by Takashi Amano, who pioneered the technique of tying Riccia to rocks and driftwood using hairnets to create lush, bright green carpet-like surfaces. Left floating, it forms a thick mat at the water surface that provides excellent cover for fry and shrimp. When submerged and attached, it releases oxygen bubbles in a process called pearling, creating a spectacular visual effect. It is not a true moss but behaves similarly and is essential in the competition aquascaping world.
Keeping this species
- co2
- Recommended for attached growth and pearling
- light
- Medium to high
- max size
- Surface mat; attached clumps 2–5 cm thick
- placement
- Surface (floating) or foreground/hardscape (attached)
- substrate
- None — floats or attach to hardscape with net/thread
- growth rate
- Fast
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Water it likes
- ph
- 6.0–8.0
- notes
- Floats naturally; requires netting or thread to hold submerged. Produces prolific Oâ‚‚ bubbles in good light/COâ‚‚.
- hardness
- 0–15 dGH
- temperature
- 138–183°F (59–84°C)