Chemical Analysis of Tank Water PARAMETERS TEST METHODS Total Hardness Magnesium Flouride Nitrate Calcium Chloride pH Conductivity@22.4°C TDS Iron APHA 2340 B & C APHA 3500 Mg B APHA 4500 F-D APHA 4500 NO3 B APHA 3500Ca B APHA 4500 Cl B APHA 4500H+B APHA 2510 B APHA 2540 C APHA 3120 B