Sirona® Chlorinating Granules
Product Overview
A proven choice for spa owners who need a fast-dissolving sanitizer that maintains a consistent 3 ppm free chlorine level.
Sirona Chlorinating Granules feature a 99% concentration of Sodium Dichloro-s-Triazinetrione Dihydrate, providing a stable source of chlorine for hot tubs. This 4 lbs. container is what pool techs reach for when they need a sanitizer that dissolves swiftly without leaving residues or bleaching surfaces. In our experience, this formula reliably handles organic contaminants while protecting against chlorine loss in high-heat environments.
Benefits & What Makes It Different
99% Sodium Dichlor Concentration
This high-purity formula ensures you aren't adding unnecessary fillers to your spa water, keeping TDS levels manageable over time.
Rapid Dissolution
Unlike tablets, these granules dissolve upon contact with water, making them ideal for quick adjustments or shocking after heavy bather loads.
Built-in Stabilization
Because this product contains Cyanuric Acid, it protects your chlorine residual from UV degradation if your hot tub is located outdoors.
Product Details
Sodium Dichloro-s-Triazinetrione Dihydrate 99%
0.5 oz per 500 gallons (10 oz per 10,000 gallons) for maintenance; 1 oz per 500 gallons for super chlorination.
Compatibility
- Do not mix with other chemicals
- Wait until chlorine is below 5 ppm before entering spa
- Compatible with most spa finishes including acrylic and vinyl
When To Use This
Pro Tip
In hot climates, the stabilizer in this Dichlor formula is essential to prevent the sun from burning off your chlorine in minutes. Always measure with a clean, dry lid and add the granules directly to the water with the jets running; never pre-mix in a bucket.
Common Questions & Instructions
How much Sirona Chlorinating Granules should I add to my 500 gallons hot tub?
For routine maintenance, add 0.5 oz per 500 gallons to reach the recommended 2 to 3 ppm range; for super chlorination, increase the dose to 1 oz per 500 gallons.
Can I use these granules in a pool instead of a spa?
While chemically similar to pool dichlor, this 4 lbs. size and formulation are specifically labeled for spa use to ensure proper dosing and safety in smaller water volumes.
Will this product affect my spa's pH or Alkalinity?
Sodium Dichlor is nearly pH neutral, meaning it won't cause the drastic pH spikes associated with liquid chlorine or calcium hypochlorite, simplifying your water balance.
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.
