# Adjusting the pH in a hot tub - URL: https://hidrostyle.ro/en/blog/reglarea-ph-ului-in-jacuzzi - Publicat: 2024-09-27 - Rubrică: Hidromasaj - Autor: Hidrostyle > Find out how to test and correctly adjust the pH in a hot tub. Discover the importance of a balanced pH and the steps for keeping the water clean and safe. ## The importance of testing the pH in a hot tub Maintaining a balanced pH in hot tubs is essential for the safety and comfort of users, as well as for the longevity of the equipment. This simple measure can make the difference between a relaxing experience and an unpleasant or even dangerous one. Check the pH level weekly and before every use. The pH can be affected by: - The number of users - Organic contamination of the water - The quality of the water used - The products used in the spa - The type of disinfectant used ## **Maintaining an appropriate pH level is important for:** - Optimising the effects of disinfectants - Keeping the water at a comfortable level - Preventing damage to the equipment The recommended range for the pH in a hot tub: 7.2-7.6 ## **The effects of an unbalanced pH:** ### If the pH level in the hot tub is too low (the water is acidic): - The disinfectant is no longer effective and the risk of water contamination increases - The water can become irritating for users - The spa equipment can corrode ### If the pH level in the hot tub is too high (the water is alkaline): - The disinfectant is no longer effective and the risk of water contamination increases - Deposits will form on the spa shell and on the equipment - The water is no longer clear and will produce foam - It can lead to the filter becoming blocked ## **Steps for testing and adjusting the pH in a hot tub:** ### Testing the water We recommend two testing methods which, in our view, are the most effective: - Testing with a reagent test kit. This is considered the optimal testing method - Test strips, the method most used by spa owners. Bear in mind that these strips are sensitive to heat and humidity, which can lead to incorrect readings, so store them according to the instructions ### Using the recommended products If, after testing, you find that the pH in the hot tub is high, add sodium bisulphate (also known as sodium hydrogen sulphate): pH minus. Conversely, if the pH is low, add sodium bicarbonate to the water in the spa: pH plus. ### Diluting the products Using a small bucket, take water from the spa and add sodium bisulphate to lower the pH or sodium bicarbonate to raise the pH. Always observe the quantities recommended on the product label so that the pH adjustment in the hot tub is done correctly. ### Starting the pumps Activate the self-cleaning cycle when you add the products to the hot tub. It is important not to use the spa while you are adjusting the pH. ### Adding the diluted products gradually Follow this step strictly so as not to damage the shell or the equipment in the hot tub. ### Waiting and retesting After adding sodium bicarbonate or sodium bisulphate, wait 2 hours before testing the water in the spa. Failing to follow this guidance can lead to inconclusive measurements. If the pH in the hot tub has still not been corrected after the recommended interval, repeat the steps described above and test the water again. ### Draining the hot tub periodically You should do this every 4 to 6 months. The need to change the water in the spa becomes all the more obvious the harder it is to bring the pH level into the recommended range. In conclusion, testing and maintaining an appropriate pH in hot tubs is not just a recommendation but a necessity. This simple but crucial process ensures clean, safe water, protects the equipment and optimises the experience for users. By monitoring regularly and adjusting the pH promptly, you can enjoy the full benefits of your hot tub, with the peace of mind of having created a safe, comfortable environment for relaxation. ### FAQ – Frequently asked questions #### What is the recommended range for the pH in a hot tub? The recommended range is 7.2-7.6. #### What effects can an unbalanced pH have? A pH that is too low can make the water irritating and can corrode the equipment. A pH that is too high can reduce the effectiveness of the disinfectant, form deposits and block the filter. #### How is the pH in a hot tub tested? Two methods are recommended: using a reagent test kit or test strips. #### What products are used to adjust the pH? Sodium bisulphate (pH minus) is used to lower the pH, and sodium bicarbonate (pH plus) is used to raise it. #### How long should I wait after adjusting the pH before retesting the water? Wait 2 hours before retesting the water in the spa after adding the pH adjustment products.