Alkalinity Increaser
Total alkalinity helps stabilize pH in spa water. Learn why alkalinity increaser is used and when it matters.
Need a dosing estimate? Open the free Spa Chemical Calculator.
Why this chemical is used
Alkalinity increaser raises total alkalinity, usually when pH is unstable or alkalinity tests below the recommended range.
When it is needed
Total alkalinity is not the same as pH. It is the buffering capacity that helps pH resist rapid movement.
How to use it safely
- Test before adding anything.
- Calculate dose based on actual spa volume.
- Add chemicals separately with circulation running.
- Wait, circulate, and retest before adding more.
- Follow the product label and spa manufacturer instructions.
Small spas are easy to overdose. When unsure, add less, circulate, and retest.
Next step: test your water, enter your readings into the calculator, then adjust slowly and retest.
Recommended spa supplies
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Alkalinity increaserSpaGuard Total Alkalinity Increaser
Raises total alkalinity so pH is less jumpy after soaking and chemical additions.
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