Where to buy Knob Coral
Best known price right now: $13.30 at World Wide Corals. Prices are checked periodically and may change.
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World Wide Corals
$13.30 (last checked)
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About Knob Coral
Favia gravida forms massive, dome-shaped colonies with distinctive raised, knob-like corallites that give the coral its common name. Polyps are typically tan, brown, or grey with contrasting oral disc coloration, and corallites may display radial symmetry with prominent septa.
Key facts
- Appearance Description
- Favia gravida forms massive, dome-shaped colonies with distinctive raised, knob-like corallites that give the coral its common name. Polyps are typically tan, brown, or grey with contrasting oral disc coloration, and corallites may display radial symmetry with prominent septa.
- Min tank size
- 20 gallons
- Water Parameters
- Temperature: 72-78°F pH: 8.1-8.3 Salinity: 1.023-1.025
- Lighting Requirement
- Medium (150–250 PAR)
- Additional Notes
- Favia gravida is a hardy LPS coral with distinctive knobby tentacles. Retract it fully if health declines and check for competing allelopathy.
- Care Requirements
- • Moderate to high lighting (PAR 200–400) • Moderate water flow to prevent detritus buildup • Feed small meaty foods 1–2x weekly (zooplankton, mysis shrimp) • pH 8.1–8.3, Calcium 400–450 ppm, Alkalinity 8–11 dKH • Temperature 76–78°F (24–26°C)
- Growth Rate
- Moderate
- Coloration
- Tan, brown, grey, or green with contrasting polyp coloration; some specimens display banded or spotted patterns on the corallites.
- Care difficulty
- Moderate
- Placement Recommendation
- Middle
- Coral Type
- LPS
- Origin
- Indo-Pacific region from the Red Sea and East Africa through Southeast Asia to the Great Barrier Reef and Indo-Australian Archipelago.
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