Acropora millepora

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

Acropora millepora is a highly sought-after species of SPS (Small Polyp Stony) coral native to the Indo-Pacific region. Known for its vibrant coloration, it can range from bright green and blue to stunning purple and yellow hues. The branches of A. millepora are often characterized by a delicate, fine structure and a bushy, compact growth pattern. This coral is fast-growing and can quickly dominate an area of the reef, making it a beautiful yet high-maintenance addition to a well-established reef tank. Due to its specific environmental requirements, it is best suited for advanced hobbyists who can provide stable conditions for optimal growth and health.

Placement in the Tank

Acropora millepora requires strong lighting to achieve optimal health and vibrant coloration. A light intensity of 250-350 PAR is ideal for this species, and it should be placed in the upper sections of the tank to ensure it receives the necessary amount of light. As an SPS coral, A. millepora also thrives in high water flow conditions. The flow should be strong enough to keep detritus from settling on its branches but not so strong as to cause damage or stress the coral.

Water Parameters

Maintaining the right water parameters is critical to the success of Acropora millepora. The recommended range includes:

• 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 growth and stability.
• Calcium: 400-450 ppm, necessary for proper skeletal development.
• Magnesium: 1250-1350 ppm.
• Nitrate: Less than 5 ppm, as elevated nitrate levels can lead to poor growth and stress.
• Phosphate: Below 0.03 ppm, as high levels can lead to algae competition and negatively affect the coral’s health.

Feeding

Acropora millepora mainly relies on zooxanthellae algae for photosynthesis, but it will also benefit from supplemental feeding. In tanks with limited plankton, feeding zooplankton, phytoplankton, or liquid coral foods a few times a week can help boost its growth. It’s important not to overfeed, as this can lead to excess nutrients in the water, resulting in algae growth and poor water quality.

Maintenance and Care

Regular maintenance is essential for keeping Acropora millepora healthy:

• Water Changes: Perform regular water changes (10-15% weekly) to keep the water quality stable and remove toxins and waste buildup.
• Water Parameter Monitoring: Regularly check temperature, pH, calcium, alkalinity, and nitrate levels to ensure that they are within the optimal range for A. millepora.
• Pruning: Since Acropora millepora is a fast-growing coral, it may require occasional fragging or pruning to control its growth and prevent overcrowding in the tank.
• Pest Control: Keep an eye out for pests such as red bugs, flatworms, or Aiptasia, which can damage or irritate the coral. If pests are detected, take immediate action to remove them from the tank.

Compatibility

Acropora millepora is an aggressive coral and should be placed with adequate space between it and other corals, especially soft corals and LPS species. It is best housed with other non-aggressive SPS corals, provided that they are not in direct contact with one another. The coral’s sweeper tentacles can sting and damage nearby corals, so be sure to give it plenty of space to grow.

Conclusion

Acropora millepora is a beautiful and vibrant coral species that can thrive in the right conditions, making it an excellent choice for advanced hobbyists. With its high care level requirements, including strong lighting, high water flow, and stable water parameters, A. millepora can become a stunning centerpiece in a well-maintained reef tank. When given the proper care, it will reward its keeper with fast growth and striking colors, adding a touch of beauty to any aquarium.