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Water Parameter


Parameter

Recommendation

Typical Surface Ocean

Calcium 380-450 ppm 420 ppm
Alkalinity 2.5-4 meq/L 2.5 meq/L
7-11 dKH 7 dKH
125-200 ppm CaCO3 equivalents 125 ppm CaCO3 equivalents
Salinity 35 ppt 34-36 ppt
sg = 1.026 sg = 1.025-1.027
Temperature 76-83° F Variable2
pH 7.8-8.5 OK 8.0-8.3 (can be lower or higher in lagoons)
8.1-8.3 is better
Magnesium    
1250-1350 ppm 1280 ppm
Phosphate < 0.03 ppm 0.005 ppm
Ammonia <0.1 ppm Variable (typically <0.1 ppm)
Silica < 2 ppm, much lower if diatoms are a problem  
<0.06 - 2.7 ppm
Iodine Control not recommended 0.06 ppm total of all forms
Nitrate < 0.2 ppm Variable (typically below 0.1 ppm)
Nitrite < 0.2 ppm typically Variable (typically below 0.0001 ppm)
Strontium 5-15 ppm 8 ppm
ORP Control not recommended Variable
Boron < 10 ppm 4.4 ppm
Iron Below Kit Detection Limits (additions OK) 0.000006 ppm

 

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