Key Considerations for Coral Care in Reef Aquariums
1. Water Quality Maintenance
Nutrient Control: Keep nitrate (NO₃) below 20 ppm and phosphate (PO₄) below 0.05 ppm to prevent algae overgrowth and coral stress.
pH and Alkalinity: Maintain pH between 8.1–8.4 and alkalinity (KH) at 8–10 dKH to support coral calcification.
Calcium and Magnesium: Calcium levels should exceed 350 ppm (ideal: 400 ppm), while magnesium stabilizes at 1250–1350 ppm for skeletal growth.
2. Lighting and Flow Requirements
Lighting: Adjust based on coral type:
SPS Corals: High PAR (200–400) with metal halides or LEDs.
LPS/Soft Corals: Moderate PAR (50–150); NPS corals thrive in low light.
Water Flow: Moderate to strong flow prevents detritus buildup but avoid direct blasts on delicate polyps.
3. Feeding and Nutrition
NPS Corals: Require frequent feeding (2–3x daily) with rotifers, coral slurry, or amino acids.
Photosynthetic Corals: Benefit from trace elements (e.g., iodine, strontium) added weekly.
4. Acclimation and Placement
Gradual Introduction: Move corals to target locations over 2–4 weeks to avoid shock.
Spacing: Maintain 5–10 cm gaps between aggressive corals to prevent chemical warfare.
5. Routine Maintenance
Water Changes: Replace 20–30% weekly with RO/DI water to replenish trace elements.
Equipment: Use protein skimmers and live rock to reduce organic waste.
Conclusion: Successful coral keeping hinges on stable water parameters, species-specific care, and consistent monitoring. Prioritize low-nutrient environments, proper lighting, and gradual acclimation for vibrant reef ecosystems.