When you measure your pH level you are measuring the relative acidity and alkalinity in your water on the pH scale. The pH scale is numbered from 0-14 with a value of 7 being considered neutral or balanced.

Ideally your spa or hot tub should have a pH level between 7.4 and 7.8. A value below 7.4 indicates that your water is too acidic. Acidic water can lead to skin and eye irritation, can cause your sanitizer to be less effective, and can ultimately damage the internals of your spa. A value above 7.8 indicates your water is too alkaline (basic). Water that is too alkaline can contribute to scale build-up and foamy or cloudy water. Keeping your pH levels balanced creates a more comfortable soaking environment, avoids scale and calcium build-up, and will keep your spa free from corrosion.

Total Alkalinity is the measurement of dissolved alkaline substances in water. It helps control the pH level and acts as a barrier against changes to your water’s pH, so it must be balanced correctly.

Ideally your spa or hot tub should have a Total Alkalinity level between 80-120 mg/l ppm. Levels above or below this range makes balancing pH levels challenging. A value below 80 mg/l ppm can cause your water to become corrosive and acidic and even stain or damage your hot tub surfaces. Algae may bloom if Total Alkalinity drops which can cause you discomfort. A value above 120 mg/l ppm can cause your water to become cloudy and allow scale to grow on surfaces and equipment.