Sirona® Chlorinating Granules
Product Overview
A proven choice for maintaining a consistent 2 to 3 ppm free chlorine residual in hot tubs without leaving behind cloudy residue.
In our experience, Sirona Chlorinating Granules are the standard specification for spa owners who need a fast-dissolving sanitizer that won't spike pH levels. This 2 LB container features 99% Sodium Dichloro-s-Triazinetrione Dihydrate, providing a concentrated dose that reliably handles contaminants and odors in small-volume water environments without leaving any residue.
Benefits & What Makes It Different
99% Sodium Dichlor Concentration
This high-concentration formula dissolves swiftly to eliminate algae and bacteria without leaving gritty residue on spa surfaces.
Stabilized UV Protection
Because this formula includes stabilizer, it protects against chlorine loss due to sunlight, which is essential for outdoor hot tubs.
Precise Spa Dosing
Formulated specifically for smaller volumes, allowing for accurate measurement of 0.5 oz per 500 gallons to maintain safe water levels.
Product Details
Sodium Dichloro-s-Triazinetrione Dihydrate 99%
0.5 oz per 500 gallons for maintenance; 1 oz per 500 gallons for super chlorination.
Compatibility
- Do not mix with other water treatment products
- Add directly to spa water only
- Wait until chlorine levels are 5 ppm or lower before swimming
When To Use This
Pro Tip
In hot climates, chlorine burns off faster even in covered spas; always test your water before entry to ensure you are within the 2 to 3 ppm range for safety.
Common Questions & Instructions
How much Sirona Chlorinating Granules do I add to my 500-gallon hot tub?
For routine maintenance, add 0.5 oz per 500 gallons to reach a target level of 3 ppm; for super chlorination, increase the dose to 1 oz per 500 gallons.
Does this product contain cyanuric acid or stabilizer?
Yes, as a Sodium Dichlor-based sanitizer, it adds a small amount of cyanuric acid to the water with every dose to protect the chlorine from UV degradation.
How long should I wait to use the spa after adding these granules?
You must wait until the free residual chlorine level drops to 5 ppm or lower; reoccurring treatment is prohibited above levels of 5 parts per million.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
