What Is a Scoly Coral?

Scolymia corals are large polyp stony (LPS) corals native to the Indo-Pacific. Commonly referred to as Scoly coral or Button Scoly, they are typically solitary polyps with a circular shape and a central mouth. Their vivid color patterns—ranging from neon green to deep red and rainbow—make them a favorite among reef keepers.

Ideal Tank Conditions

• Lighting: Low to moderate (75–125 PAR). Avoid intense lighting to prevent bleaching.
• Water Flow: Low to moderate. Gentle, indirect flow helps prevent tissue damage.
• Temperature: 75–80°F (24–27°C)
• Salinity: 1.024–1.026 SG
• pH: 8.1–8.4
• Alkalinity: 8–9 dKH
• Calcium: 400–450 ppm
• Magnesium: 1250–1350 ppm

Placement Tips

Place your Scoly coral on the sand bed or a low rock ledge with minimal flow. Ensure it has space to expand and isn’t shaded by other corals. Keep at least 3 inches of distance from neighbors, as Scolymia can extend sweeper tentacles at night.

Feeding & Nutrition

While Scolymia corals are photosynthetic, they benefit from supplemental feeding. Offer:

• Frozen mysis or brine shrimp
• Reef Roids or powdered coral foods
• Target feeding 1–2 times per week

Growth & Fragging

Button Scoly corals grow slowly and are typically not fragged due to their single-polyp structure. If fragging is attempted, use a coral saw and allow ample healing time in a low-stress environment.

Common Issues

• Recession: Often caused by poor water quality or excessive light.
• Bleaching: Reduce lighting intensity and check parameters.
• Brown Jelly Disease: Remove affected tissue and perform iodine dips.