Check the listing for details. In The Swim Alkalinity Increaser - Raise Pool Alkalinity. Condition: New. Listed at 79.99 USD. Striking the proper pH balance in your pool water is critical for safe and enjoyable swimming which is why many pool owners may find the need to use an alkalinity increaser from time to time. Generally speaking, you'll need to increase pool alkalinity whenever the pH drops below 7.4 or when alkalinity levels drop below 80ppm. Ideally, you'll always want alkalinity to range between 80 and 120ppm and should you dip below this you'll need to use a pool alkalinity increaser.When alkalinity is too high, your pool water is equally unsafe and scales will begin to form on your pool and pool equipment. Granular alkalinity increaser can help to prevent these problems by stabilizing the pool pH and ensuring that your pool is safe for swimming. More importantly, maintaining a balanced pH by.Striking the proper pH balance in your pool water is critical for safe and enjoyable swimming which is why many pool owners may find the need to use an alkalinity increaser from time to time. Generally speaking, you'll need to increase pool alkalinity whenever the pH drops below 7.4 or when alkalinity levels drop below 80ppm. Ideally, you'll always want alkalinity to range between 80 and 120ppm and should you dip below this you'll need to use a pool alkalinity increaser.When alkalinity is too high, your pool water is equally unsafe and scales will begin to form on your pool and pool equipment. Granular alkalinity increaser can help to prevent these problems by stabilizing the pool pH and ensuring that your pool is safe for swimming. More importantly, maintaining a balanced pH by.