SpaGuard® Rapid-Dissolve Alkalinity Increaser Tabs – 1.25 lb

Test total alkalinity using an accurate test kit; target range for most spas is 80 – 120 ppm.

With pump running, add 2 tablets per 250 gallons to raise total alkalinity approximately 30 ppm.

Allow the tablets to dissolve fully and circulate for at least 15 minutes.

Retest total alkalinity after 4 hours and adjust further only if required.

Store product in a cool, dry place out of direct sunlight and keep container tightly sealed.

Q: How fast do the tabs work?

A: The Rapid-Dissolve technology ensures the tablets begin to disperse immediately once added, raising alkalinity quickly without lengthy wait times.

Q: Is this compatible with all spa sanitizing systems?

A: Yes — the product works with chlorine, bromine, saltwater, mineral and other standard spa sanitizers.

Q: What happens if alkalinity remains too low?

A: Low total alkalinity can lead to unstable pH (“pH bounce”), which may cause equipment corrosion, surface damage and discomfort for bathers.

Q: Can I use too much?

A: While the dosing rate is simple, overuse can raise alkalinity too high, which may result in scaling or pH drift upward. Always test before and after treatment.

Q: Do I still need to check sanitizer and pH levels separately?

A: Absolutely — this product only adjusts alkalinity. Regular testing of pH, sanitizer residual and other water chemistry remains essential.