Help! My hot tub water is cloudy.

Help! My hot tub water is cloudy.

We have all experienced that moment, when you are ready to unwind after a long day at work or planned a relaxing drink with the friends and family in your social bubble, upon lifting back the cover of your hot tub and instead of looking into a warm, crystal-clear inviting hot tub, you are faced with a murky haze of what seem to be cloudy unusable water and immediately, your bubble of excitement bursts.

Rest assured, from the number of times that we have been asked, it is probably safe to say that this has happened to nearly all new and experienced hot tub owners at some point; so you are not in isolation. 

The team here at SpaChem has put together the following information to help you ensure that your hot tub water doesn’t cloud your experience.

Why does it happen?

If you want to avoid cloudy water in your hot tub, then we need to understand what the possible causes are. There can be numerous reasons that cause this problem, but in most cases that we have helped with, they fall under one of the following two areas:

Chemical Imbalance. This can be due to an improper pH balance, incorrect sanitizer levels, and poor water chemistry.

Poor Filtration. There’s no nice way to explain this one – it’s a combination of dead algae, organic debris, and insoluble particles suspended in the water that has not been extracted by your filter giving it a cloudy appearance.

There’s no need to panic, there are things that can be done to help resolve the problem. Just take a look at our handy hints and tips below. 

How to correct it?

If you want to avoid cloudy water and being faced with these pesky particles floating in your hot tub follow these steps below:

Filter Maintenance. If you neglect the filters in on your hot tub, you are likely to experience water and operating problems. Luckily, we have a range of filter cleaners available to ensure your filter is in the best possible condition. If you are unsure which is the best solution to use, simply contact our team of experts for advice.

Chemical Balancing Total Alkalinity.  It’s important to remember the whole premise around “Water Balancing” this all starts with your Total Alkalinity, TA ideal range for a hot tub is 80 to 120ppm, Alkalinity is the buffer to balancing your pH correctly and if you have a low TA reading you can simply add a Total Alkalinity Increaser – so you must check the chemical balance of your water daily. 

Chemical Balancing pH
& pH Minus. So now that the TA has been balanced and we can now move on to your pH balancing and the ideal pH range for a hot tub is 7.2 to 7.6, if you have a high pH reading then adding some pH minus will help you in bringing your pH level down to the ideal range and on the reverse if your hot tub has low pH and you need to increase use pH Plus to bring your pH levels to the ideal range, so you must check the chemical balancing of your water. For more information visit our website for the most up to date water balancing chemical information at

Hot Tub Shock. If your happy that your Total Alkalinity and pH levels are within the ideal ranges stated and you still faced with cloudy water all is not lost, before you drain all of the water away, take a moment to try a Hot Tub Shock / Non-Chlorine Oxy Shock, this weekly treatment will oxygenate your water and help break down the small particles causing the cloudy appearance and bring back the clarity to your hot tub water.  For more information on the products available and how to conduct a shock treatment visit

Start Again. If you have followed the above steps and still experiencing cloudy water, then it may be time to drain your hot tub and start again with fresh water. Always start with your Total Alkalinity moving on to your pH balancing and then your primary sanitizer.

Is it safe to use my hot tub with cloudy water?

If you have lifted back the cover of your hot tub and you are presented with cloudy water, is it still safe to use? Just one more time? Sadly, the answer to this is no. If your hot tub is not crystal-clear then you shouldn’t be getting in it.

If you are at all unsure, then please contact one of our water treatment experts on 02921 280422 or contact us via Whatsapp on 07540184405.



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