How to Clear Cloudy Pool Water


A clean pool is one of the best things you can do for your health. It provides a place to exercise or just relax. Pollution from algae, bacteria, and other contaminants can cause cloudy water and ruin that feeling quickly. Fortunately, it doesn’t take much work to keep your pool water healthy!

Cloudy pool water is a common problem that can be easily solved. 


One of the most common causes of nasty-looking water is organic debris like leaves, pollen, or dirt. To fix this problem you need to clean out your filter daily (or at least every few days), vacuum any hoses you use with a brush attachment, and make sure not to pile up too many leaves near the surface where they’ll get into the water. With some regular maintenance on these three items, your pool will be back to its sparkling state in no time!

It starts with identifying what type of algae you have in your pool and then using the right chemical treatment for that type. Don’t forget to clean your filter regularly, vacuum the floor and check for any leaks!


One way to determine what type of algae you have is with a red-tinted test kit. The different kinds of pool algae include green, mustard, or black algae and yellow or peachy algae. Green algae is the most common and the easiest to prevent and remove if treated early.


If you see spots forming at the bottom of your pool, this means that you have mustard or black algae. This type of algae must be vacuumed out because it cannot be killed with chemical treatments. To treat this type of pool algae, start by getting rid of as much as possible by vacuuming; then use Algae Fix according to the directions on the bottle (the dose varies depending on how many inches deep your pool is). You will need to repeat this process every week or two.


If your pool water has turned green, then you have pea soup algae. This type of algae is very slimy and usually forms in sheets (or “green rain”). It can be treated with Algae Attack, but it must be applied only when the pool pump is running because if the applicator touches the slime, it can spread.

Remember to also use a brush to scrub all surfaces of the swimming pool. If you still see pea soup algae several weeks after using Algae Attack, try brushing all areas once more and treat again monthly until it’s gone. Finally, make sure that you run your filter 24/7 during this treatment; otherwise, the algae will grow back.


If your pool water is cloudy or opaque, despite following all the tips above, this means that you have black algae (also called “black bugs”). This type of algae cannot be treated with traditional chemicals like most other types can; it must be killed manually (and by physically removing it). To do so, use a net to scoop out as much of the algae as possible; then clean the filter regularly and brush the sides of the pool thoroughly until all visible algae has been removed.


There are many other causes of cloudy pool water. Follow these steps to get your pool back to crystal clear perfection: 

Your options for clearing your pool will depend on what type of material you have in your pool – fiberglass or vinyl liner pools typically need more drastic measures than gunite pools because they don’t allow sediment to settle at the bottom like gunite pools do. These days there are many types of chemicals available for treating murky water depending on the cause:

clean pool

1) If you have an automatic cleaner running all day, stop it for a day. This agitation of the water will stir up sediment and make your water cloudy.

2) If you have an above-ground pool, use the brush to scrub the walls and floor of your pool – this will get rid of any gunk or other particles clinging to the surface that cause cloudiness in the first place.

3) If you have a salt system running, it might be time to drain and refill your pool with fresh water: this is because over time, too much salt can build up at the bottom and start working its way into your pool water.

4) Use a clarifier: typically added directly to the pool by means of pouring or spraying, clar work by encapsulating contaminants so they can be easily removed.

5) A filter should remove any lint or anything else that might be clouding your water, so it’s a good idea to clean the filter before you do anything else (note: this is easier said than done – if you have an automatic pool cleaner, make sure it’s not running while trying to clean the filter!)

6) If you notice foam or suds on top of your pool, this means there are oils in your water. These should be treated with enzymes that will break down the oil and allow for easy removal through filtration.

7) Check your balance. High amounts of either calcium or chlorine can create cloudy water conditions by themselves; low amounts won’t allow for disinfection. Make sure your chemicals are balanced accordingly!

8) If it has been a while since you’ve performed any maintenance, add some shock/superchlorinate to the pool – this will get rid of all residual chlorine and start working with fresh water right away.

9) Low alkalinity is another common cause of cloudy water problems. Raise your alkalinity by using pH Increaser with caution, though: you don’t want to raise it too high or you risk creating other issues in your pool!

10) Lastly, check with your local pool store for another possibility they might have that could resolve the problem with little inconvenience to you. Some stores even offer same-day service if you need immediate assistance!



The best way to clear up cloudy pool water depends on what type of material you have in your pool. There are many different reasons why a pool can get murky, but the most common is when there’s too much sediment at the bottom or not enough chemicals being circulated through it.

Follow these steps and tips for creating crystal clear water that sparkles:  1) If you have an automatic cleaner running all day, stop it for a day – this will stir up any sediment and make your water cloudy. 2) Use a clarifier to encapsulate contaminants so they can be easily removed from your pool. 3) Check with your local store for another possibility if nothing else has worked!

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