With the Fauna Marin Multi Reference Solution you can test your test kits under accurate conditions.
Calcium 422 mg/l
Magnesium 1315 mg/l
Potassium 409 mg/l
Salinity 35 psu (25 °C)
Conductivity 53,0 mS/cm (25 °C)
dKH 6,6 (2,35 meq/l)
Strontium 8 mg/l
Nitrat 10 mg/l
PO4 0.2 mg/l