How to Shock the Pool With Chlorine After it Rains
- 1). Measure the levels of free chlorine using a test kit. Free chlorine is the chlorine that kills bacteria and contaminants in your pool. Make sure the chlorine reaches the right ppm (parts per million) levels to properly shock the pool. The pool should have a chlorine level of about 10 ppm for proper shock levels. The chlorine test kit will help you determine the ppm.
- 2). Check your owner's manual to see how many gallons of water the pool holds. Use one gallon of chlorine for every 10,000 gallons of water.
- 3). Pour the chlorine into your pool after it rains or when chloramine levels become high. Chloramine is also called combined available chlorine (CAC). It results when free chlorine mixes with contaminates and is no longer working to sanitize the pool.
- 4). Allow the pool to shock overnight for safety. If this timing isn't realistic, wait an hour and use the test kit to check whether chlorine levels are safe for swimming. Refer to the test kit's directions for guidance on safe levels.