Testing Pool Water Free Chlorine

Dpd tests and oto phenol tests.

Testing pool water free chlorine. Here is the part where total chlorine comes into play. Chlorine test strips are. Testing the pool water is particularly important if your pool is left uncovered which exposes it to sunlight rain leaves and wind. You subtract the amount of free chlorine from the total chlorine to get your combined chlorine level.

This will bring your pool water chlorine back up to a level where it s very effective at killing organisms and disinfecting the pool water. For test kits take your water sample from 12 to 18 inches below the surface after the circulation system has been on for an hour. Local pool service providers often will test your pool water for free. You know that free chlorine combined chlorine total chlorine.

While it s recommended that you test your pool water every day your pool should be fine if you only test the water every other day. Test strips are the easiest way to test free chlorine but test kits are more accurate. In general the free chlorine level should remain between 1 5 and 2 5 parts per million. Intheswimrecommends 2 0 to 3.

However ideal free chlorine levels are dependent on cyanuric acid levels. Typical water tests include measurements for free and total available chlorine ph total alkalinity calcium hardness and cyanuric acid. If you test with a test kit and the color is clear then redo the test but use one half the amount of water. Elevated chlorine should drop quickly with use and sunlight.

Oto phenol kits test for chlorine and ph. Add sanitizer to raise chlorine. This is very important to help keep swimmers safe and keep the water in the pool clear. Pool test kits can be more time consuming to use but they are typically more accurate than test strips.

There are three methods that you can use to test for free combined and total chlorine in your pool which include chlorine test strips chlorine test kits and an electronic digital chlorine tester. This is a normal reading. There are two popular types of test kits that can be used for your pool. Total chlorine is the amount of chlorine used or not in your water.

You shouldn t have a free chlorine reading of 3 and a total chlorine reading of 7. Methods to test free chlorine in the field in developing countries pool test kits. Then multiply the chlorine estimations you get by 2. Combined chlorine levels should not be above 0 5 parts per million and swimmers are likely to be more comfortable if the level is below 0 2 parts per million.

If your pool has a salt system the salt level should also be checked. Occasionally seek a second opinion to make sure your testing is accurate. The pool and hot tub alliance recommends keeping free chlorine levels between 2 0 and 4 0 parts per million ppm. The first option for testing uses a liquid chemical oto orthotolidine that causes a color change to.

0 ppm for a stabilized pool. Color wheel test kits use a powder or tablet chemical dpd n n diethyl p phenylene. In the test if your free chlorine reading matches your total chlorine reading your pool is not experiencing a high demand for chlorine.