Description
Hydnophora – Hydnophora rigida
Hydnophora rigida, commonly known as Horn Coral or Velvet Horn, is a striking SPS coral known for its sculpted appearance and vivid green to neon coloration. Native to the Indo-Pacific, this coral adds architectural beauty and texture to reef aquariums with its unique ridge-like growth.
- Lighting: Moderate to high (150–300 PAR)
- Flow: Moderate to strong
- Placement: Middle to top of the tank in a well-lit area
- Temperature: 76–82°F (24–28°C)
- Salinity: 1.024–1.026 SG
- pH: 8.1–8.4
- Alkalinity: 8–12 dKH
- Calcium: 400–450 ppm
- Magnesium: 1200–1400 ppm
- Feeding: Primarily photosynthetic; benefits from occasional feeding of microplankton or coral-specific foods
- Aggression: High (can extend sweeper tentacles)
- Growth Rate: Moderate to fast
- Care Level: Moderate
- Compatibility: Best placed with space from neighboring corals
