Cloudy pool water can instantly make a swim seem less inviting – and on these hot summer days, you won’t want to miss out, especially if you’ve already invested in one of the best home swimming pools.
Thankfully, it's usually pretty simple to get the water in your garden pool cleared up and looking pristine. With our tips, you’ll be able to cool off outdoors in no time – without worrying about what's lurking at the bottom.
Below, we explain four reasons why your pool water might be cloudy, and how to get it sparkling once again.
How do I clear cloudy pool water?
The bottom line when it comes to preventing cloudy water is to maintain a proper pool maintenance routine. But if you need to know how to clear it fast, you're in luck: there are a couple of different methods that will restore your water’s sparkle within just a few days.
1. The pool clarifier method
The first approach is to use a clarifier, which makes particles in your pool clump together, making it easier for the filter to remove them. Clean your pool first using a pool brush, then follow your chosen product’s application instructions. Remember to keep the filter running until the water is clear again – this can take around three days.
What you will need
Suitable for pools, hot tubs and paddling pools, this clarifier will help your water look pristine again.
Keep your pool in tip-top condition with this complete cleaning kit, including a net and brush.
2. The pool flocculant method
Alternatively, you can use a pool flocculant. As Swim University says, this is more suited for extremely cloudy water. Like a clarifier, it also clumps together contaminants, but it makes them sink to the floor of your pool.
You'll then need to hoover them up with a manual pool vacuum, set to the waste setting. Keep water levels topped up with a garden hose as you carry out the job. This method requires more work on your behalf, but it should clear your pool quickly – usually in one to two days.
What you will need
Can't see the bottom of your pool? These flocculant granules will come to the rescue, helping to clarify the water.
Rechargeable, cordless and easy to use, this underwater vacuum can be used in both pools and hot tubs.
Why is my pool water cloudy?
1. Issues with your pool's filter
One of the most common reasons for cloudy water is a problem with your pool's filter. If it's not working properly, it won't be able to clear contaminants from your pool effectively.
This is why checking and cleaning your filters – and replacing them when necessary – should be a crucial part of your maintenance routine. Remember to clear out skimmer baskets frequently, too.
According to Swim University, you should also make sure your filter is on for long enough each day for the entire pool's worth of water to pass through it – this will usually take at least eight to 12 hours.
2. Unbalanced pool chemicals
Another reason for cloudy pool water is unbalanced chemical levels. This includes your chlorine levels and the pH and alkalinity.
Test the water often (using a kit like this from Amazon) and adjust the levels with chemicals accordingly. It's particularly wise to do this after heavy use, such as a pool party.
Shocking a pool, just as with shocking a hot tub, should also be part of your regular routine for an extra boost of sanitation and to keep your water looking clean and clear. Cloudy pool water after shocking may occur, but it's generally just a temporary reaction and will clear up as the filter runs.
3. Rainwater affecting your pool's water
You may also notice cloudy pool water after rain. As Swim University explains, this is because the excess water will dilute the chlorine levels in your pool, making it less effective at dealing with bacteria. Rainwater run-off from your pool patio or deck can also introduce an influx of contaminants.
Again, you'll need to test and adjust the chemistry of your pool accordingly, as well as clean out any debris that may have blown into the pool during the storm.
4. Algae build-up
If you've noticed your pool turning green as well as cloudy, pool algae is likely to be the cause. This is a common problem but can be dealt with by giving it a thorough deep clean (although milder cases can be treated with an algaecide).
While cloudy pool water can be unsightly, the good news is that it's possible to clear it with the help of a couple of handy products and correct maintenance.
For more expert advice, read our guide on swimming pool types and swimming pool mistakes to avoid.
