Acropora formosa (Green)

• Indo-Pacific
• High Care Level
• For Advanced Hobbyists
• High Placement in Reef Tank

Acropora formosa (Green) is a stunning and vibrant branching species of stony coral from the Indo-Pacific region. This coral is known for its unique green coloration that can range from bright lime green to deeper hues, often with subtle blue or purple accents on the tips. Its rapid growth and branching structure make it a dynamic addition to any reef tank, though it requires precise care and stable environmental conditions. Acropora formosa (Green) is best suited for advanced hobbyists who can maintain the specific parameters it needs to thrive.

Placement in the Tank

Acropora formosa (Green) requires strong lighting, ideally between 250-350 PAR. It should be positioned in the upper sections of the tank, where it can receive the high-intensity light it needs, mimicking its natural habitat in shallow, sunlit reef zones. Additionally, this coral requires strong water flow to support nutrient uptake and remove waste. High water movement is essential for proper respiration and to prevent detritus buildup on the coral’s surface.

Water Parameters

Maintaining stable and optimal water conditions is critical for the health of Acropora formosa (Green). The recommended water parameters are:

• Temperature: 24°C to 28°C (75°F to 82°F), with a stable temperature of 26°C (79°F) being ideal.
• Salinity: 1.023–1.025 specific gravity (SG), with 1.024 being optimal.
• pH: 8.0 to 8.4, with an ideal pH of 8.2.
• Alkalinity (dKH): 8-12 dKH, with 9-10 dKH being ideal for healthy growth.
• Calcium: 400-450 ppm to support robust skeletal formation.
• Magnesium: 1250-1350 ppm.
• Nitrate: Less than 5 ppm, as elevated nitrate levels can negatively impact coral health.
• Phosphate: Below 0.03 ppm to prevent algae overgrowth and nutrient competition.

Feeding

While Acropora formosa (Green) depends primarily on zooxanthellae algae for photosynthesis, it can benefit from supplemental feeding to enhance growth. Providing zooplankton, phytoplankton, or liquid coral foods once or twice a week can help supplement its diet, especially in tanks with limited plankton. Be mindful not to overfeed, as this can negatively affect water quality.

Maintenance and Care

Proper care and maintenance are essential for the long-term health of Acropora formosa (Green):

• Water Changes: Perform regular water changes (10-15% weekly) to maintain stable conditions and remove harmful substances.
• Water Parameter Monitoring: Regularly check temperature, pH, alkalinity, calcium, and phosphate levels to ensure consistent water quality.
• Pruning: As Acropora formosa (Green) can grow rapidly, occasional fragging may be necessary to prevent overcrowding and to encourage healthier growth.
• Pest Control: Watch for pests such as red bugs, Aiptasia, and flatworms, which can harm the coral. Take immediate action if pests are detected.

Compatibility

Acropora formosa (Green) is an aggressive species due to its long sweeper tentacles, which can damage nearby corals. It is best placed away from soft corals and LPS species, as they may be harmed by the stinging tentacles. Acropora formosa (Green) does well with other non-aggressive SPS corals, provided they are given adequate space to grow without competing for light and nutrients.

Conclusion

Acropora formosa (Green) is a breathtaking addition to any reef aquarium, with its beautiful green hues and fast-growing, branching structure. However, its high care level makes it best suited for advanced hobbyists who can meet its precise needs. By providing strong lighting, strong water flow, and stable water parameters, this coral can flourish and become a stunning centerpiece in your reef tank.