Pool alkalinity, which is also known as total alkalinity, is an important aspect of swimming pool maintenance, as unstable pool alkalinity can cause damage to the pool walls and harm swimmers. According to Pool Wizard, total alkalinity should be between 80 parts per million (ppm) and 120 parts per million. Adding sodium bicarbonate substances into the water raises pool alkalinity. Instead of using expensive pool chemicals, baking soda can effectively increase pool alkalinity.
Check your swimming pool alkalinity with an alkalinity test kit, available at any pool supply store. The current water alkalinity will determine the amount of baking soda to be added to the water.
Add 14 pounds of baking soda per 10,000 gallons of water if its alkalinity measures 10 ppm. Add 12 pounds of baking soda per 10,000 gallons of water if its alkalinity measures 20 ppm. Water with an alkalinity level of 40 ppm requires 9 pounds of baking soda while water with an alkalinity of 60 ppm requires only 6 pounds of baking soda per 10,000 gallons of water. If the water alkalinity measures 80 ppm, pour in 3 pounds of baking soda per 10,000 gallons of water.
Sprinkle the appropriate amount of baking soda across the surface of the swimming pool; never pour the entire amount into a single spot, as this slows the baking soda's ability to raise the water alkalinity.