How to Test Pool Water

Intermediate 10 min 21 steps 1243 views Rating: 4.1/5 Published: 2026-04-04

Run the pump in the morning for 15 minutes.. Take the sample in the middle of the pool.. Collect a sample in a cup or a bottle.

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Steps

1

Run the pump in the morning for 15 minutes.

Step 1

Run the pump in the morning for 15 minutes.

2

Take the sample in the middle of the pool.

Step 2

Take the sample in the middle of the pool.

3

Collect a sample in a cup or a bottle.

Step 3

Collect a sample in a cup or a bottle.

4

Dip the collecting cup elbow-deep into the water.

Step 4

Dip the collecting cup elbow-deep into the water.

5

Test at least once a week.

Step 5

Test at least once a week.

6

Take the pool sample to an expert when you're unsure.

Step 6

Take the pool sample to an expert when you're unsure.

7

Purchase a water testing kit.

Step 7

Purchase a water testing kit.

8

Submerge the test strips for 15 seconds.

Step 8

Submerge the test strips for 15 seconds.

9

Compare the results to the color chart.

Step 9

Compare the results to the color chart.

10

Look for a pH level between 7.2 and 7.8.

Step 10

Look for a pH level between 7.2 and 7.8.

11

Test for a chlorine level between 1 and 3 ppm.

Step 11

Test for a chlorine level between 1 and 3 ppm.

12

Aim for an alkalinity result between 120 and 150 ppm.

Step 12

Aim for an alkalinity result between 120 and 150 ppm.

13

Check that the cyanuric acid levels are between 20 and 30 ppm.

Step 13

Check that the cyanuric acid levels are between 20 and 30 ppm.

14

Choose a calcium hardness level based on your pool type.

Step 14

Choose a calcium hardness level based on your pool type.

15

Calculate the amount of chemicals you need to add.

Step 15

Calculate the amount of chemicals you need to add.

16

Add the chemicals at night when everyone's out.

Step 16

Add the chemicals at night when everyone's out.

17

Pour the chemicals into the pool one at a time.

Step 17

Pour the chemicals into the pool one at a time.

18

Gradually add chemicals to the pool according to the instructions.

Step 18

Gradually add chemicals to the pool according to the instructions.

19

Remove metal stains with a home filter and a scale remover.

Step 19

Remove metal stains with a home filter and a scale remover.

20

Clear out green water with chlorine.

Step 20

Clear out green water with chlorine.

21

Drain the pool when all else fails.

Step 21

Drain the pool when all else fails.

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