Check the listing for details. SpaGuard Total Alkalinity Increaser 2 lb - 6 Pack. Condition: New. Listed at 77.94 USD. SpaGuard's Total Alkalinity Increaser is a reliable and straightforward solution for spa owners to increase their spa's alkalinity levels. Low alkalinity levels can cause severe damage to your spa, leading to corrosion, weakened sanitizer effectiveness, and skin and eye irritation. However, with Total Alkalinity Increaser's effective formula, these issues can be reversed, and your spa's pH level can be stabilized, preventing pH bounce that can be a hassle for spa owners. This product ensures that you can spend more time enjoying your spa, as it helps maintain a safe and comfortable environment for bathers, reducing the need for constant maintenance. Product Features: 1 tbs. per 100 gallons raises the total alkalinity 25 parts per million Eliminates "pH bounce" Helps prevent equipment and spa surface corrosion and damage