May 15, 2015

5 Tips for Cleaning a Cloudy Pool

Tips for Cleaning a Cloudy Pool

Even on the most scorching summer day, no one wants to cool off by diving into a cloudy pool. Make your pool inviting with these tips from our Purewater pool specialists for crystal-clear water:

Remove Debris & Algae

There is no point in even starting to clean out your cloudy pool until you have cleared away the debris that has sunk to the bottom and killed off any live algae. Vacuum the pool thoroughly, even if the cloudiness prevents you from seeing the bottom of your pool. Debris like leaves and dirt act as food for algae, so you will kill two bird with one stone by getting on it quickly.

Circulation & Filtration

When our Purewater pool specialists encounter cloudy pools, filtration is often the culprit. If you have a broken or inefficient pump or you aren’t running it often enough, fine particles end up suspended in your pool water instead of being trapped by the filter. Run your pump 24/7 during pool season with the return jets pointed downward. If you have a sand filter, wait until the filter pressure is 7 PSI above clean pressure before backwashing. If the cloudiness comes back, you should chemically clean the sand with Filter Brite or Filter Perfect. If your equipment is old or the sand bed has become saturated, it may be time to upgrade.

Balance & pH

Pools become hard to clear when the pH level is above 7.6. When you’re trying to clear a cloudy pool, your pH level should be a steady 7.2. Bring in a sample of your water to our store and we will test for the balance before you start adding treatments and extra chemicals.

Sanitation & Chlorine

Cloudy water carries a high chemical demand. Organic wastes are often to blame. You may need to shock repeatedly, throw in extra pucks, and crank the chlorinator. Use liquid chlorine or hTh extra instead of weak calcium-based shock, which might just make your pool even cloudier.


If the above steps didn’t fix your cloudy pool, clarifying is the next step. For a moderately cloudy pool, try Clarifying Tabs. Very cloudy pools need Drop & Vac. Always follow the label directions carefully, with Drop & Vac you need to turn off your filter and wait for sediment to sink. Then you can vacuum it up. If this solves the issue, remember to follow-up with weekly treatments of Pool Perfect or Phos Free to prevent cloudy water from reoccurring. If you have any questions, one of our Purewater pool specialists would be happy to help.

If your pool doesn’t clear up or if you want a more specific and detailed prescription, call or come into the store with a water sample for free analysis. We’ll get the problem sorted out quickly so you can get back to fun in the pool.