- Alkalinity: 8-11 dKH - Calcium: 380-450 ppm - pH: 8.1-8.4 - Temperature: 74-78°F - Easy to moderate to keep - Description: Torch corals, or Euphyllia, have long tentacles resembling torches that sway in the water. They prefer stable water parameters, moderate lighting, and medium flow. Suitable for hobbyists at all experience levels.