Swimming pools

Q1 describe how ph levels of pools are tested

Using your swimming pool test kit you will use the large tube and fill it up to the top solid line with pool water from a depth of 18 inches. Add one drop of solution No. 4 and mix by gently swirling. This solution is sodium thiosulfate, a chlorine neutralizer. 

Add five drops of Solution 2, a phenol red indicator, and mix by gently swirling. Then you have to compare the color with the pH color standards on the plastic tester.

Q2 how to keep your pool at Ph level 7.2 

To raise or lower pH, a pool custodian simply adds acids or alkalis into the water. For example, adding sodium carbonate (soda ash) or baking soda will generally raise the pH, and adding muriatic acid or sodium bisulfate will lower the pH.