Maintaining proper water chemistry in your hot tub is essential for keeping the water clear safe and comfortable. One of the most common water balance issues hot tub owners face is high alkalinity. When alkalinity levels are too high it can cause cloudy water scaling and make it difficult to balance pH levels. Fortunately, lowering alkalinity is a straightforward process when done correctly.
Understanding Alkalinity in Your Hot Tub
One of the most common questions we get is "How to Lower Alkalinity in Your Hot Tub?" Total alkalinity measures the concentration of alkaline substances in your hot tub water and acts as a buffer to help stabilize pH levels. The ideal range for alkalinity in a hot tub is between 80 and 120 parts per million (ppm). When alkalinity levels are too high it can lead to difficulty maintaining a balanced pH which may result in skin irritation damage to hot tub components and ineffective sanitizers.
If you notice your hot tub water becoming cloudy or you are struggling to keep pH levels in check it is likely that the alkalinity is too high. Testing your water with a reliable test kit or test strips will confirm if alkalinity needs to be lowered.
Using pH Decreaser to Lower Alkalinity in Your Spa/Hot Tub
The most effective way to lower alkalinity in a hot tub is by using a pH decreaser, also known as sodium bisulfate. This chemical is designed to lower both pH and alkalinity levels helping to bring your water into the proper range. Start by turning on the jets to circulate the water, then carefully measure the correct amount of pH decreaser according to the manufacturer’s instructions. It is always best to start with a small amount, as it is easier to add more later if needed.
Once added allow the water to circulate for at least two to three hours before testing again. If alkalinity is still too high, repeat the process until levels fall within the recommended range. Be mindful that excessive use of pH decreaser can cause the pH to drop too low, so always test the water after each adjustment.
Aeration Method for Balancing pH and Alkalinity in Your Hot Tub or Home Spa
If lowering alkalinity also causes pH levels to drop below the ideal range, you can use aeration to naturally raise the pH without affecting alkalinity. Aerating the water means running the jets or water features to introduce oxygen, which helps bring pH back up. This method is especially useful if repeated use of pH decreaser has made the water too acidic.
Keeping your hot tub’s alkalinity balanced is essential for preventing scaling and ensuring that sanitizers work effectively. It is recommended to test your water at least once a week and make adjustments as necessary. Regular maintenance and monitoring will help prevent major water chemistry issues and extend the life of your hot tub components.
For expert advice on water maintenance or to find high-quality chemicals for your spa, call The Hot Tub Man at 403-550-5140 or fill out our online contact form. Our team can guide you through the best products and techniques to keep your hot tub water clear balanced and enjoyable all year long – and don’t forget that we also offer a fantastic spa maintenance package!
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