What is Alkalinity in a Pool

This water-fighting superhero neutralizes acids and bases, keeping your pH balanced and safe. Alkalinity helps to protect your pool from unnecessary surprises like sharp changes in pH levels, which can cause health concerns.

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What is the ideal Alkalinity level in a Pool?

Should be around 80 - 120 ppm for prime swimming conditions.

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How to Test Alkalinity in a Pool?

Here is a step-by-step guide on how to do it

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How to decrease Alkalinity in a Pool?

You can do this by using muriatic acid. When handling it, take extra caution by wearing thick gloves and goggles, plus covering your body with protective clothing and a mask to safeguard against fumes as well as splashback or blowback from unexpected winds.

1: Test the Alkalinity in the Pool

2: Turn off the pump

3: Measure the amount of acid needed. Always read the directions in the bottle, each one has its own specific measurements. On average, for a 10,000 gallons pool, you can use from 20 to 30 oz of acid to reduce alkalinity by 8 to 12 ppm. You can pour small amounts each day (8-15 oz) so you can test alkalinity levels and avoid adding too much. For a 20,000 gallons pool go double!

4: Add the Muriatic acid with a slow hand, Slowly pour it into the deeper end of your pool and let it settle for 30 minutes to an hour, its natural aeration helps lower your alkalinity levels

5: Turn on the pump and let it run for several hours

6: Test the results, always check pH, and repeat the process if necessary

Here is a complete guide on How to balance Pool Water

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How to increase Alkalinity in a Pool?

You can use baking soda to achieve it

1: Test the Alkalinity in the Pool

2: Measure the amount of Baking soda you need to use based on the package instructions. On average, for a 10,000 gallons pool you can use between 1 - 2 lbs to raise the alkalinity from 8 to 15 ppm. You can put small amounts per day (8 - 16 oz) so that you can test the progress and avoid adding too much. For a 20,000 gallons pool go double!

3: Add the baking soda, Keep your pump and filter running, and remember a little goes a long way - sprinkle some into your pool, circulate it around, and go slow.

4: Test the results after a few hours or the next day (check pH too), and repeat the process if necessary.

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What causes Alkalinity levels to change?

After a busy weekend, it's easy to get carried away and give your pool an extra dose of shock! While that may help you rest easier at night (or the next day) Alkaline levels can spike - making pH rise right along with it. Low Sanitizer levels, too much chlorine stabilizer (cyanuric acid), sunblock, oils, alcohol, rain, sweat, and urine in the water also contribute to changes in both of those readings.

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Why is balanced Alkalinity important in a Pool?

Proper alkalinity in a pool is important because it helps to stabilize the pH level, which in turn helps to prevent the water from becoming too acidic or too basic, which brings consequences:

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Consequences of Low Alkalinity:

You’re in trouble when your pool water drops below 80 ppm Alkalinity! You may end up with corroded surfaces and equipment, stained walls, itchy eyes, and skin - all topped off by green water, and your pH levels will be spiking like an Olympic athlete as well

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Consequences of High Alkalinity:

Going above the recommended alkalinity level of 120ppm in your pool water can cause some serious problems; You may find yourself with cloudy water, scaling of surfaces and equipment leading to clogged filter and heater elements, and burning or itching eyes and skin, not to mention an abnormally high pH level that’s very difficult to lower, which affects chlorine effectiveness - yikes!

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How does pH and Alkalinity affect each other?

Too much or too little alkalinity can be a real headache for your pool - if you have too much of this particular chemical hanging around then your pH will raise and as a result, your chlorine may not work as well; on the other hand, when it's low, there won't be enough of the essential buffering chemical to keep pH levels stable.

Here is more information about pH & how to balance it