Sirona® Chlorinating Granules
Product Overview
A fast-dissolving sanitizing formula formulated specifically to maintain water clarity in hot tubs and spas without altering calcium levels.
Formulated with 99% Sodium Dichloro-s-Triazinetrione Dihydrate, Sirona Chlorinating Granules provide rapid sanitation in a convenient 4 lbs. container. Designed specifically for hot tubs, this fast-dissolving dichlor formula maintains a target of 2 to 3 ppm free available chlorine without clouding water or leaving gritty residue behind. It reliably handles routine sanitation and shock treatments in high-temperature spa environments.
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Benefits & What Makes It Different
99% Active Sodium Dichlor
Provides rapid, near-neutral pH sanitation that dissolves completely without leaving insoluble calcium residue in your spa.
Precise Spa Dosing
Add half an ounce per 500 gallons for routine maintenance or 1 ounce per 500 gallons for super chlorination shock.
Swift Residue-Free Clarification
Quickly establishes 2 to 3 ppm available chlorine to control organic contaminants and eliminate nuisance bather odors.
Product Details
Sodium Dichloro-s-Triazinetrione Dihydrate (99%)
0.5 oz per 500 gallons for routine maintenance (2-3 ppm); 1 oz per 500 gallons for super chlorination.
Compatibility
- Do not pre-mix with small amounts of water or dissolve in a bucket
- Never mix directly with calcium hypochlorite, trichlor tablets, or pool acid
- Do not enter the hot tub if free chlorine levels exceed 5 ppm
When To Use This
Pro Tip
In hot climates and heavily used spas, chlorine demand and CYA can spike quickly. Once your cyanuric acid level approaches 50 ppm, schedule a drain and refill to keep your sanitizer working efficiently and prevent chlorine lock.
Common Questions & Instructions
How do I dose Sirona Chlorinating Granules in my spa?
For routine sanitation, add half an ounce per 500 gallons of water with the jets running to maintain a residual level of 2 to 3 ppm. For super chlorination, add 1 ounce per 500 gallons. Always use a clean, dry lid to measure and broadcast directly into the spa water.
Does this product add cyanuric acid or increase calcium hardness?
As a 99% sodium dichlor dihydrate sanitizer, it gradually introduces cyanuric acid (stabilizer) with regular use, but it will not raise calcium hardness levels or cause scaling on your tub's heating elements.
Can I pre-dissolve Sirona Chlorinating Granules in a bucket before adding it?
No. Never pre-dissolve this product or mix it with small amounts of water, as concentrated dichlor can react violently and release hazardous gases. Broadcast the dry granules directly into your hot tub water with the circulation pump running.
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.
