Whether you already have a hot tub or are considering purchasing one, it’s crucial to understand how to balance the chemical levels in your water to ensure it is clean, healthy, and safe for users. This article explains why maintaining a hot tub’s optimal condition and the efficiency of its sanitizers depends on maintaining a balance between total alkalinity and pH.

Total alkalinity and pH are closely related, and controlling them is essential to hot tub water care. Alkalinity adjustments also affect pH adjustments, and vice versa. Since high pH levels are far more challenging to control, we advise correcting your total alkalinity balance first since it serves as a buffer and avoids quick pH changes.

What does total alkalinity mean?

The amount of dissolved alkaline compounds in water is known as total alkalinity. It needs to be balanced appropriately since it helps regulate pH. You must keep the total alkalinity level in your hot tub between 80 and 120 mg/l ppm. Maintaining pH balance becomes challenging when levels are above or below this range.

Less than 80 mg/l ppm can make your water caustic and acidic and possibly harm or taint the surfaces of your hot tub. If the alkalinity falls, algae may bloom, making your hot tub unsightly. Your water may get hazy over 120mg/l ppm, and scale may begin to form on your pool’s surfaces and equipment.

What contributes to a hot tub’s high alkalinity?

High alkalinity can be brought on by adding an excessive amount of chemicals, microbes, or body fluids like sweat or lotions. The same is true if you reside in a region with hard water.

What causes a hot tub to have low alkalinity?

Using a hot tub cover is advisable since rainwater can lower alkalinity levels and produce an acidic pH. Low-pH chlorine pills can also have an impact on it.

What do pH values mean?

PH levels use a pH scale to determine how acidic or alkaline the water is. It is calibrated from 0 to 14, with 7 being neutral or balanced. You should maintain your hot tub’s Ph level between 7.2 and 7.8.

If it’s 7.2 or lower, your water is overly acidic, which might make your sanitizer less effective and cause eye burn and itching. High acidity can also cause expensive damage to the components of your hot tub. Scale buildup, foam, and cloudy water are all possible effects of pH levels of 7.8 or higher and high alkalinity. Maintaining proper pH levels keeps your bathers more comfortable, prevents scale and calcium buildup, and prevents corrosion in your tub.

How can you check the pH and total alkalinity in your bathtub? 

We advise measuring the pH, total alkalinity, and sanitizer levels by using dip test strips. They are simple to use and give quick, precise readings, allowing you to modify the chemical balance.

Regular hot tub water tests

Depending on how regularly you use your hot tub, we advise testing the water in your spa at least once a week to maintain it fresh and clean.

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