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Water Quality

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A few notes on the most important element of your tank.

Test Water conditions once a week.



Optimum Water Quality Parameters for Tropical Marine Aquariums:


Temp. 75F (optimum natural range is about 68 to 84)

Hydrometer Reading 1.022 to 1.0240

pH 8.15 to 8.4

Alkalinity 2.5 to 5.0 meq/L

Ammonia (NH3) zero

Nitrite (NO2-) zero

Nitrate (NO3-) < 10 mg/L (ion)

Phosphate (PO4-3) < 0.05 mg/L

Calcium (Ca2+)400 to 475 mg/L

Dissolved Oxygen > 6.90 mg/L

Carbon Dioxide (CO2)< 2.0 mg/L



These numbers are for fore-reef conditions; organisms from this habitat are the most demanding, especially of oxygen. In back reef, lagoon and inshore zones, salinity may be lower, currents variable and the concentrations of nutrient ions much higher around a blue-water coral reef.



*Parts per million and milligrams per liter are basically the same.

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