Water Quality Parameters for Reef Tanks

1. Salinity

   • Range: 35 parts per thousand (ppt)

   • Specific Gravity (SG): 1.025–1.026

   • Importance: Salinity is vital for maintaining osmotic balance in corals and fish.

2. Temperature

   • Range: 23–26°C

   • Importance: Consistent temperature is critical to prevent stress and coral bleaching.

3. Alkalinity (Carbonate Hardness)

   • Range: 7–9.5 dKH

   • Importance: Supports coral calcification and stabilizes pH levels.

4. Calcium (Ca)

   • Range: 400–450 ppm

   • Importance: Essential for coral skeleton building and overall health.

5. Magnesium (Mg)

   • Range: 1250–1350 ppm

   • Importance: Prevents calcium and alkalinity precipitation, maintaining balance.

6. pH

   • Range: 7.9 –8.5

   • Importance: Stable pH supports coral health and metabolic processes.

7. Nitrates (NO3)

   • Range: 1–10 ppm

   • Importance: Provides nutrients for corals but must be kept low to prevent algae blooms.

8. Phosphates (PO4)

   • Range: 0.04–0.1 ppm

   • Importance: Supports coral growth in small amounts but excess fuels algae growth.

Key Notes for Stability

• Consistency is Critical: Fluctuations in any parameter can stress corals and marine life.

• Testing Schedule: Test weekly for stability or more frequently when making changes.

• Adjust Gradually: Avoid rapid parameter changes to reduce stress on livestock.