Sirona® Spa Down
Product Overview
What spa techs reach for when elevated pH threatens heating elements and sanitizer efficiency.
Formulated with 95% Sodium Bisulfate, Sirona Spa Down is packaged in a convenient 2.5 lbs. container designed to reliably lower spa pH and total alkalinity. Keeping water within the standard 80–120 ppm total alkalinity range protects components against scale while allowing bromine or chlorine sanitizers to perform at peak strength.
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Benefits & What Makes It Different
95% Sodium Bisulfate Formula
Delivers fast-dissolving dry acid power that quickly lowers water pH without the hazards of splashing liquid acids.
Total Alkalinity Control
Brings total alkalinity down to the target 80–120 ppm range to prevent calcium scaling on heater elements and jets.
Universal Sanitizer Compatibility
Functions seamlessly with bromine, chlorine, mineral, and ozone sanitation systems without clouding the spa water.
Product Details
Sodium Bisulfate 95%
Add 1 to 2 tablespoons per 500 gallons with jets running; retest after 30 minutes
Compatibility
- Compatible with bromine, chlorine, ozone, and mineral sanitizers
- Do not pre-mix with other water treatment chemicals; broadcast directly into water
When To Use This
Pro Tip
Spa jet aeration naturally raises pH over time. In regions with hard fill water, test weekly and broadcast small increments of Sirona Spa Down directly over the water with the jets running for 15 minutes to prevent sudden chemical overshoots.
Common Questions & Instructions
How much Sirona Spa Down is needed to lower spa pH and alkalinity?
For a standard 400 to 500 gallon hot tub, broadcast 1 to 2 tablespoons across the water surface with jets running, then retest after 30 minutes to verify total alkalinity is within 80–120 ppm and pH is between 7.2–7.6.
Can I use Sirona Spa Down in a spa that uses bromine?
Yes, this 95% Sodium Bisulfate balancer is fully compatible with bromine, chlorine, and alternative sanitizer systems, maintaining sanitizer longevity and water balance.
Why does my hot tub pH constantly climb?
Aeration from jet action and air blowers off-gasses carbon dioxide, naturally driving pH upward. Adding granular Sodium Bisulfate corrects this drift before scale can form on internal heaters.
