Palintest Calcium Hardness Tablets

Palintest Calcium Hardness Tablets are use to measure the total hardness of your swimming pool water. They are suitable for all Palintest pool photometers.

Palintest Calcium Hardness Tablets

• Calcicol No.1    250 Tablets
• Calcicol No. 2   250 Tablets
• Manufacture Part no. AP252

Test Procedure

1. Filter sample if necessary to obtain a clear solution.
2. Fill test tube with sample to the 10 ml mark.
3. Add one Calcicol No 1 tablet, crush and mix to dissolve.
4. Add one Calcicol No 2 tablet, crush and mix to dissolve. Ensure all particles are completely dissolved.
5. Stand for two minutes to allow full colour development.
6. Select Phot 15 on the Photometer.
7. Take Photometer reading in the usual manner (see Photometer instructions).
8. The Total Hardness result is displayed as mg/l CaCO3.

Interferences

1 Unusually high levels of iron (above 10 mg/l) will cause low results for total
hardness.
2 The pH required in the test is closely controlled by a buffer mixture
included in the tablet formulation. However, to avoid exceeding the buffer
capacity strongly acid or alkaline samples should be adjusted to within the
pH range 4 to 10, prior to the start of the test.

Other reagent tablets for Palintest Photometers

For Free chlorine levels use Palintest DPD No.1 Tablets

For total chorine levels use Palintest DPD No. 3 Tablets

Download your Pool Chemistry Guide