Description
SpaGuard Rapid-Dissolve Alkalinity Increaser Tabs - 1.25 lb
Easy Alkalinity Balancing with Fast-Dissolving Spa Tabs
SpaGuard Rapid-Dissolve Alkalinity Increaser Tabs are designed to quickly raise total alkalinity in spa, hot tub, and swim spa water. Proper total alkalinity helps buffer pH, reduce “pH bounce,” improve bather comfort, and protect spa surfaces and equipment from corrosion caused by low alkalinity or unstable water balance.
This 1.25 lb bottle uses convenient rapid-dissolve tablet technology to make water balancing easier than traditional granular dosing. Just test your water, use the dosage guidance to determine how many tabs are needed, and add the tablets to the filter compartment with clean, dry hands while the jet pump is running.
SpaGuard Rapid-Dissolve Alkalinity Increaser Tabs are a smart choice for routine hot tub maintenance, especially after fresh fills, water changes, or test results showing low alkalinity. They help create a more stable foundation for pH control and sanitizer performance.
Key Benefits
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Raises total alkalinity quickly: Helps bring low alkalinity back into the proper range.
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Helps control pH bounce: Proper alkalinity buffers water against sudden pH changes.
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Protects equipment and surfaces: Helps reduce corrosion risk caused by low alkalinity or unstable pH.
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Supports bather comfort: Balanced water feels better and is easier to maintain.
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Rapid-dissolve tablet format: Effervescing tabs disperse treatment throughout the water quickly.
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Easy filter-well application: Drop tabs into the filter compartment with the jet pump running.
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Made for spas and swim spas: Designed for smaller bodies of water where precise dosing matters.
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No messy measuring: Tablet format helps reduce guesswork compared with loose granular products.
Product Details
Dosage Guide
Compatibility and Requirements
SpaGuard Rapid-Dissolve Alkalinity Increaser Tabs are intended for spas, hot tubs, and swim spas. Use an accurate test strip or test kit to determine current total alkalinity before treatment. The target alkalinity range listed by retail product sources is 80 to 120 ppm.
Apply the tablets with clean, dry hands to the filter compartment while the jet pump is running. Follow your spa or swim spa manufacturer’s guidelines for circulation and water balancing. After the tablets dissolve and circulate, retest the water before making additional adjustments.
This product is not a sanitizer, shock, pH decreaser, or calcium hardness increaser. Continue maintaining proper sanitizer, pH, calcium hardness, filtration, and regular water care.
How to Use SpaGuard Rapid-Dissolve Alkalinity Increaser Tabs
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Test spa or swim spa water with an accurate test strip or kit.
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Compare the result to the target alkalinity range of 80 to 120 ppm.
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Use the dosage guide to determine how many tablets are needed.
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With clean, dry hands, add the tablets to the filter compartment.
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Keep the jet pump running while the tablets dissolve and disperse.
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Wait for the tabs to dissolve and circulate through the water.
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Retest total alkalinity before adding more product.
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Adjust pH only after total alkalinity is in the proper range.
Frequently Asked Questions
What do SpaGuard Rapid-Dissolve Alkalinity Increaser Tabs do?
They raise total alkalinity in spa, hot tub, and swim spa water. Proper alkalinity helps control pH bounce and supports more stable water balance.
What is the ideal total alkalinity range?
Retail product information lists the ideal total alkalinity range as 80 to 120 ppm.
How many tabs should I use?
Use 2 tabs per 250 gallons to raise total alkalinity by about 30 ppm. Larger increases or larger spas require more tabs based on the dosage chart.
Where do I put the tablets?
Add the tablets to the filter compartment with clean, dry hands while the jet pump is running.
How fast do the tablets dissolve?
Retail directions state to wait about 5 minutes for the tabs to dissolve, though circulation and water conditions may affect dissolve time.
Do these tabs help with pH?
They do not directly lower pH, but raising total alkalinity helps buffer the water and reduce pH bounce.
Can I use this in a swim spa?
Yes. Product directions include spa and swim spa capacities, making it suitable for swim spa water balancing when used as directed.