
How to Fix Low Alkalinity in Pool
A Comprehensive Guide to Raising Pool Alkalinity
If you're facing low alkalinity in your pool, don't worry! This guide will walk you through the steps to effectively raise your pool's alkalinity levels. Low alkalinity can lead to water quality issues, including pH fluctuations and potential damage to your pool surfaces. By following the steps outlined here, you can restore balance and ensure a safe swimming environment for everyone.
Understanding Low Alkalinity in Pools
Low alkalinity in pools can lead to several issues, including unstable pH levels, which can cause irritation to swimmers and damage to pool equipment. Alkalinity acts as a buffer for pH levels, helping to prevent rapid changes. When alkalinity is low, the water becomes more acidic, leading to potential corrosion of metal fixtures and etching of plaster surfaces.
What You Need to Fix Low Alkalinity
- Alkalinity increaser (sodium bicarbonate)
- Pool testing kit
- Water source (hose or bucket)
- Protective gloves and eyewear
- Stirring tool (pool brush or stick)
Step-by-Step Guide to Raise pool alkalinity
- Test Your Pool Water: Use a pool testing kit to determine the current alkalinity level. Ideal alkalinity levels should be between 80-120 ppm (parts per million).
- Calculate the Required Amount of Alkalinity Increaser: If your alkalinity is below 80 ppm, you will need to add sodium bicarbonate. Generally, you will need about 1.5 pounds of sodium bicarbonate for every 10,000 gallons of water to raise alkalinity by 10 ppm.
- Add the Alkalinity Increaser: Wearing protective gloves, slowly add the calculated amount of sodium bicarbonate to the pool while the pump is running to ensure even distribution.
- Brush the Pool: Use a pool brush to help dissolve the sodium bicarbonate and mix it thoroughly into the water.
- Retest the Water: Wait at least 6 hours after adding the increaser, then retest the alkalinity. Repeat the process if necessary until the desired level is reached.
Safety Notes
Always wear protective gloves and eyewear when handling pool chemicals. Ensure proper ventilation when adding chemicals to avoid inhaling fumes.
Quick Facts
Quick Facts
Common Troubleshooting Tips
- If the alkalinity does not increase after adding sodium bicarbonate, check for other chemical imbalances in the water.
- Ensure that your pool's filtration system is running to help circulate the chemicals effectively.
- Consider consulting a pool professional if you continue to experience issues.
Pros and Cons of Raising Alkalinity
Pros | Cons |
---|---|
Helps stabilize pH levels | Requires precise measurement |
Prevents corrosion of pool surfaces | Over-adding can lead to high alkalinity |
Key Takeaways
- Regularly test your pool water to maintain balanced alkalinity.
- Use sodium bicarbonate to effectively raise low alkalinity levels.
- Follow safety precautions when handling pool chemicals.
- Monitor your pool's filtration system for optimal chemical distribution.

Jaden Bohman is a researcher led writer and editor focused on productivity, technology, and evidence based workflows. Jaden blends academic rigor with real world testing to deliver clear, actionable advice readers can trust.
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