How to Fix a Cloudy Hot Tub

You may be looking for some ideas on how to fix a cloudy hot tub. Good thing is, we’ll be able to help you solve that predicament through this article. Read on!

We often hear that the hot tub is cloudy, so what is this phenomenon? Is it good for your hot tub? The answer is an absolute no! In fact, it is the appearance of the countless unexpected contaminants in the water. It not only causes the bad impacts on the aesthetics for the hot tub but also poses a big problem for the hot tub’s owner.

The causes of a cloudy hot tub?

In terms of the reasons why a hot tub emerges the cloudy, we cannot forget to mention 6 bad influences:

Inappropriate level of pH or alkalinity

This factor is the first common cause when it comes to finding the reasons for the cloudiness in the hot tub. If the pH level or the alkalinity rises up, it is a good environment to make the hot tub cloudy. Therefore, it is essential to maintain the ideal level of the pH or the alkalinity in the hot tub, ranging from 7.2 to 7.6 of the pH level and between 100 and 150 ppm ( parts per million) of the alkalinity.

The lack of sanitizer level

Some are sensitive to bromine or chlorine, and they like to have the hot tub with as little as possible. That is alright if you know to use other alternatives like the ozonator or even the mineral cartridge so as to eliminate the unnecessary the particles and contaminants. It is highly recommended that the perfect sanitizer level in the hot tub remains between 2 and 3 ppm. In case this level is reduced below 1.0 ppm, it is the ideal environment for the developing of the cloudy in the hot tub.

Poor service of the filtration 

There is a misunderstanding of using the filtration in the hot tub. Many filters’ users say that when they put the filters into the hot tub, they have confidence in the ability of the filter and there’s nothing for them to consider! It is totally wrong if you only rely on the filter and do not concentrate on its cleaning and maintenance. Moreover, there will be a big problem if the hot tub filter cartridge is positioned incorrectly. Remember to ensure that the best place for the filter cartridge is at the end of both sides to force water go through the pleated hot tub filter material.

Dead algae particles 

Normally, the hot tub’s owners focus on eliminating the algae particles in the hot tub. However, there is the exception if the algae particles are too strong and develop quickly in the short term. So, these unexpected algae particles become a major threat for the hot tub.

Debris from the environment 

It is similar to the dead algae particles, all types of debris may come into the water when there is a chance. Hence, we can limit the numbers of debris but it is not an absolute job. And this is one of the main causes of the cloudy in the hot tub.

Other factors from humans 

Despite being prompted to do the necessary sanitary steps before entering the hot tub, unwanted pollutants from humans such as body oils, lotions, cosmetics, hair products, and others are also the bad contribution of the cloudy hot tub.

How to fix a cloudy hot tub?

To solve the problem of the cloudy hot tub, there is a variety of ways to apply. If the hot tub water quality is too old - that means it is in use for more than 2 months, the perfect action is to drain and then refill the water. The drain and refill method is not actually the first choice of most of the hot tub’s owner. It is easy to understand that this solution not only wastes lots of money (the electricity bill and the water bill) but also has the passive effect on the usage schedule of the hot tub’s owner. On the contrary, if the quality of the hot tub water is in service, these sufficient recommendations are very helpful for you:

1. Checking your hot tub water and shock it:

How to Test the Hot Tub Water:

Today, there are three simple ways to test the hot tub water: using an empty bottle to take hot tub water to the checking center; using a drop hot tub test and using a liquid test kit. This video below is a very clear tutorial for you:

How to shock hot tub water:

 As you can see, shocking hot tub water mainly keeps the water clear and clean. Moreover, thanks to the shocking of water, the unpleasant odors are eliminated effectively by oxidizing or even burning common contaminants out of the water. It is suggested that you should shock the hot tub water when refilling your hot tub so as to remove the bacteria containing in the hot tub.

To make the shocking process work well, you should let the cover open at least 60 minutes in order to permit the bad stuff to evaporate. Importantly, it is better for you to shock your hot tub after each use. Nowadays, there are the ultimate hot tub shock products which can you a lot:

Spa Essentials 28304000 Stain and Scale Control for Spas and Hot Tubs, 1-Pint

Spa Essentials 28304000 Stain And Scale Control For Spas And Hot Tubs

Spa Essentials 32156000 Xtra Dichlor Chlorine Shock for Spas and Hot Tubs, 2-Pound

Spa Essentials 32156000 Xtra Dichlor Chlorine Shock For Spas And Hot Tubs

Spa Essentials 32130000 Chlorinating Concentrate Granules for Spas and Hot Tubs, 2-Pound

Spa Essentials 32130000 Chlorinating Concentrate Granules For Spas And Hot Tubs

This is a composite video of three outstanding products aiding the hot tub water shocking in the cloudy hot tub:

The most interesting feature of this video is the ranging the level of the Spa Essential manufactures by the increasing strength of the products: the non-chlorine shock with no chlorine combination; the extra solution and the concentrate granule.

Here, how to do it:

  • Follow the instruction on the bottle.
  • Run the high speech jets during this process for at least 15 minutes.
  • Leave the cover open for 60 minutes to allow the bad stuff to evaporate.

You can combine two steps in one shock extra, using a non-chlorine shock to oxidize contaminants in the water and include some chlorine at the same time and then, re-enter your hot tub after an hour.

2. Maintaining the working of the filtration system

Having the proper filtration and know how to use it correctly is the vital key of the hot tub’s owner. It is significant to know that the cartridge filter in the hot tub should be usually cleaned to make sure the sparking and clear water. Thus, rinsing your hot tub filters at least once a week and soaking them in a filter cleaner once a month. Just with this simple step of the hot tub water filtration usage and maintenance, your worries of a cloudy hot tub stay far away!

3. Sterilizing the hot tub water with specialized products

Regarding as the products to sterilizer the cloudy hot tub water, be careful to use the appropriate hot tub water products to ensure the chemical is specifically designed for the hot tubs.

Impresa Products Concentrated Hot Tub Water Clarifier

Impresa Products Concentrated Hot Tub Water Clarifier

Leisure Time A Spa Bright and Clear

Leisure Time A Spa Bright And Clear

Wilton Bradley Clearwater Clarifier

Wilton Bradley Clearwater Clarifier

Happy Hot Tubs Quality Non Chlorine Shock 1kg

Happy Hot Tubs Quality Non Chlorine Shock 1kg

In spites of the solution or the powder, the method is also very simple. Here is the tips to add chemicals to the hot tub:

  • Go around your hot tub and make sure that you turn all the air bubbles off into the hot tub.
  • Select any kind of the cloudy hot tub solution and fill out the chlorine or the alkalinity or even the pH you need for your hot tub.
  • Ensure your hot tub is running and then sprinkle it on the surface of the hot tub water.
  • Plus Hexagon
    Keep the jets running for about 15 minutes and leave the cover off the hot tub.


Having the cloudy in the hot tub is not an easy thing of the hot tub’s owner. And now, you- the wise owner of the hot tub- will be not worried about the cloudy in the hot tub anymore after referring this meaningful article. Obviously, the causes leading to the cloudy hot tub mostly related to the bad habits of the users. So, in this article, we strongly recommend to each owner should pay much more attention to check the proper operation as well as the hot tub’s maintenance to prevent the cloudy in the hot tub.

We also selected the most ultimate solution to fix the cloudy hot tub and suggested the 4 premium products to treat for your hot tub in case of the cloudy existence. Again, if you have other surprising resolution to fix a cloudy hot tub, do not hesitate to share with us at our comment section. Now, enjoy your life with your perfect hot tub!

May this guide on how to fix a cloudy hot tub was able to help.

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