How To Go From Cloudy To A Crystal Clear Pool


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A cloudy pool is a very common occurrence for swimming pool owners. The most common reasons for a cloudy pool are a chemical imbalance, improper pump and filter size and algae.

Step by Step


Step 1

Chemicals- The first thing you will want to do is test your chemical levels. You want to be consistent with your pool chemical levels. Test often to ensure you have the proper amounts of chlorine and other chemical levels in your swimming pool. Use our Aqua Check 6-Way Test Strips to check for the following proper levels. If any of the levels are not within range, they will need to be adjusted.

Step 2

Filter - Make sure that your pool filter is working properly and is clean or backwashed. Also ensure that your pool filter valves are properly installed and working. Make sure that the filter valve is also in the correct position. Sand and d.e. filters require backwashing (whenever the pressure reads 8-10 psi above normal). They also require a certain amount of sand/d.e. The filter label should indicate the proper amount to be added. For a cartridge filter, clean your cartridge regularly and inspect it to make sure it is still filtering properly. Depending on the use of your swimming pool, Inyo recommends that you replace your pool filter cartridge once per season.

Step 3

Pump maintenance- Your swimming pool pump is the driving force of your filter system. The average amount of time a pump should be run per day is 8 hours. If you are getting cloudy pool water, you may want to try running it for a longer period of time. Also make sure your swimming pool pump is properly sized for your filter. If you have a higher GPM rating on your pump than your filter, it is too much for your filter to handle. This will lead to the water being passed too quickly through the filter causing poor filtration.

Step 4

Too many people in the pool- If your pool is getting a lot of use with a lot of people this create added stress to your pump and filter. Oils, urine, and other organic waste from a bather load needs to be cleaned. If this is the case run your pump for a longer period, shock it with a non-chlorine shock (if the chlorine levels are o.k.) and add a clarifier.

Step 5

Algae Growth - Whether it is dead or alive, algae will need to be removed from your swimming pool. Depending on the amount of algae in your pool there are a few steps. If your pool is very cloudy and turning green, please follow the following steps.



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Inyopools  Posted: 07/20/2017 13:22 PM  Inyo Product Specialist

Teresa - Check the spider gasket in your Multiport Valve. If it is damaged, it may be letting dirty water back into the pool during backwash and rinse. See our guide on "How to Replace a Spider Gasket on a Multiport Valve".

Teresa  Posted: 07/18/2017 8:39 AM 

Clean my pool and dirt comes right back. I checked all laterials and none of them were broken nor was the pole. Any ideas?? Also, changed sand

Inyopools  Posted: 04/01/2015 10:34 AM  Inyo Product Specialist

Janice - You do not have to replace the sand in your filter after an algae outbreak. But depending on the severity of the algae outbreak, you may have to backwash your sand several times as it is filtering the algae and you might have to shock your system several times. As your water turns clear, the same chemicals will clear your filter. Once your water is clear, follow up with an algaecide.

Janice  Posted: 03/31/2015 22:00 PM 

Is it necessary to change the sand in your filter after an algae outbreak? I had green algae and I believe there was mustard algae also.