This is actually a very common issue and a little bit of maintenance can go a long way. Become cloudy because free chlorine has become depleted after heavy usage. If you've noticed cloudy water after you've had a pool party a lot of people in your hot tub, that can definitely be the cause. Cloudy pool water also happens after heavy rain falls which dilutes the chlorine. You might also see cloudy pools on a hot day due to UV light eating up free chlorine. Agree, it's because you have a free chlorine levels and you probably need to just shock your pool. But, if you're not sure why your pool is cloudy and it's not one of these reasons that you might need to look to other solutions. There could be a faulty filter, poor water circulation, imbalanced chemicals or environmental factors and debris.
Check that your pool chemicals are correctly balanced. Improper pH and chlorine levels are usually to blame. PH is not directly related to cloudiness but it consumes and renders free chlorine ineffective when it's not in balance. You must test out and check for pH balance and chlorine levels. You may also need to monitor the total alkalinity of the pool. This can also throw off the pH and cause cloudy pool water.
If you have a chlorine imbalance you'll need to use a pool calculator to adjust the exact amount of chemical to add to your pool. The recommend chlorine level should be around 3 ppm. This should also be the same as the total chlorine is close to mine is at 0 ppm. For outdoor pools, use a chlorine stabilizer to prevent chlorine depletion as a result of UV direct light. If the combined chlorine reads about 0.5 ppm, the water could turn cloudy and actually be unsafe for swimming. At this point, you'll need to shock the pool.
To monitor the pH and total alkalinity, which affects all the letters chemical functions, you need to look for a pH level between 7.4 and 7.8. 7.6 is the ideal level to shoot for. To the pH you made a pH reducer such as muriatic acid or sulfuric acid. Anything lower than 7.0 is too low and this can also bring harmful bacteria and algae along with the cloudy water. Make sure that the total alkalinity is within the required range of 80 ppm and 120 ppm.
If you've tried all the chemicals in the pool water is still cloudy you probably have foreign particles in your swimming pool. The water clarifier can be used to collect all the fine particles that cannot be picked up by the filter. You can use a pool vacuum a manual pump.
If you tried all these things including shocking and the pool is still cloudy milky white, give it some time. It will usually cling wrap in a day or two. Does the pool still cloudy, it could be the quality of chlorine shock used. If you've tried everything and you're just frustrated give us a call. With to answer your questions and help you feel that the best way to make your pool clear, clean, and safe again.