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Leisure Time Brominating Granular | Fast-Dissolve

SKU: 45436A
$23.99

Description

Leisure Time Brominating Granular is a fast-dissolving granular bromine sanitizer that delivers active bromine on demand. Active chemistry: a combination of 84.15% sodium dichloro-s-triazinetrione (the oxidizer) and 14.7% sodium bromide (the bromide source) — a two-part formula that carries its own bromide reserve and the oxidizer needed to activate it, all in one granular product. Unlike slow-dissolve bromine tablets that feed continuously through a floater over days, Brominating Granular dissolves in seconds and brings active bromine into range within 15 minutes.

Every bromine spa needs a way to raise sanitizer fast. Slow-dissolve tablets in a floating dispenser are perfect for steady maintenance, but they can't respond quickly when bromine drops — after a party, a hot weekend of heavy use, or a stretch where the floater ran empty. When bromine residual falls to zero, you need active sanitizer back in the water in minutes, not the days a tablet floater would take to catch up. That's exactly the gap Brominating Granular fills.

Because the formula contains its own sodium bromide, it does double duty: the dichlor oxidizer converts both the product's built-in bromide and the existing bromide reserve in your water into active hypobromous acid, while simultaneously topping up the bromide bank for the tablets to draw on later. Use it to establish sanitizer at fresh fill, to boost residual between tablet feeds, or to shock the spa after heavy use — a single product that handles the fast-response side of a bromine program.

Pro Tip: Leisure Time offers two granular bromine approaches, and they serve different needs. Brom Tabs are slow-dissolve tablets fed through a floating dispenser for steady, continuous, hands-off sanitation — the everyday backbone of a bromine spa. Brominating Granular is the fast-acting counterpart: added directly to the water for an immediate bromine boost when residual drops or after heavy use. Most bromine spa owners use both — tablets in the floater for daily maintenance, granular on hand for fast corrections. They're complementary, not competing.

Brand

Leisure Time®

What's in the Box
  • (1) Leisure Time Brominating Granular — fast-dissolving granular bromine sanitizer
  • Child-resistant cap with measured-pour opening
  • Start-up, maintenance, and shock dosing chart printed on the bottle label
Key Features
  • Sanitizes and shocks in one product — granular bromine for residual maintenance plus a higher shock dose
  • Built-in bromide source — 14.7% sodium bromide helps establish and maintain the bromide reserve
  • Fast-dissolving — active bromine in range within 15 minutes, not the days a tablet floater takes
  • Add directly to water — no floating dispenser or in-line feeder required
  • Ideal for fast corrections — restores bromine after parties, heavy use, or an empty floater
  • Helps clarify water — reduces bacterial growth and supports sparkling-clear water
  • Low-odor bromine sanitation — none of the harsh chlorine smell
  • Works alongside Brom Tabs — granular for fast boosts, tablets for steady maintenance
  • Made in the USA by Leisure Time, a trusted name in spa chemistry for over 40 years
How It Works

Bromine sanitation is a two-ingredient system: you need bromide ions in the water (the "bromide bank" or reserve) and an oxidizer to convert those ions into active hypobromous acid — the form that actually kills bacteria, viruses, and algae. Slow-dissolve bromine tablets handle both jobs gradually over time, which is great for steady maintenance but slow to respond when you need sanitizer right now.

Brominating Granular packages both ingredients in fast-dissolving form. The sodium bromide (14.7%) contributes bromide ions to the reserve, and the sodium dichlor (84.15%) acts as the oxidizer that immediately converts bromide — both the product's own and any already in your water — into active bromine. Because it's granular and dissolves in seconds, the conversion happens fast: dose the product, circulate for 15 minutes, and test, and you'll typically have active bromine in the 2–4 ppm target range. This is dramatically faster than waiting for tablets to dissolve and build residual.

The dual-ingredient design is also why this product can serve as a complete fast-response bromine source. At fresh fill, a heavier dose establishes both the bromide reserve and active sanitizer simultaneously. For maintenance, a small dose tops up residual when it drifts low. For shock, a larger dose oxidizes accumulated organic load and reactivates spent bromamines back into killing form. One granular product covers all three needs on the fast-response side, while tablets in a floater handle the slow-and-steady daily maintenance.

Pro Tip: Bromine has a hard safety ceiling that chlorine programs don't emphasize as strongly: do not re-enter the spa above 8 ppm bromine— higher levels risk skin and respiratory irritation. Granular bromine raises residual fast, which makes overshooting easier than with slow tablets. Add the smaller maintenance dose first (1½ tsp per 300 gallons), circulate 15 minutes, and test before adding more. It's always easier to add a second small dose than to wait for an overshoot to drop back into the safe range before you can soak.

Directions for Use

Fresh Fill / Start-Up

  1. Clean all surfaces, rinse or replace the filter, and fill the spa with fresh water.
  2. Treat for metals with Metal Gon if your fill water contains iron, copper, or manganese (well water or older plumbing).
  3. Balance calcium hardness and total alkalinity, and adjust pH to 7.2–7.6.
  4. With the circulation system running, add 1½ tsp (7.5 g) of Brominating Granular per 300 gallons of spa water directly to the water.
  5. Measure bromine residual after 15 minutes. Repeat the dose until active bromine reaches 2–4 ppm.
  6. The spa is ready to use once bromine residual is in the 2–4 ppm range (and below 8 ppm).

Residual Maintenance

  1. Test bromine residual every 2–3 days with a quality spa test strip.
  2. When residual drops below 2 ppm, add 1½ tsp (7.5 g) per 300 gallons with circulation running.
  3. Wait 15 minutes and retest. Maintain residual at 2–4 ppm.
  4. For day-to-day maintenance, most owners rely primarily on Brom Tabs in a floater and use Brominating Granular for faster top-ups when residual drops.

Shock Treatment (After Heavy Use)

  1. For shock — after parties, heavy bather load, or visible water quality decline — add 6 tsp (30 grams) per 300 gallons of spa water.
  2. Run circulation with the cover off for at least 15 minutes.
  3. Do not re-enter the spa until bromine residual drops below 8 ppm. Test before getting in.

Storage & Handling

  • Store in original container in a cool, dry, well-ventilated area, away from direct sunlight
  • Keep tightly closed when not in use — granular bromine absorbs moisture and degrades if left open
  • Keep out of reach of children and pets
  • Never mix with other chemicals in dry form — including chlorine, other bromine products, biguanide, acids, or oxidizers. Concentrated mixing can cause violent reactions or fire. Always add directly to spa water.
  • Store separately from acids, oxidizers, and organic materials

Pro Tip: Brominating Granular and Brom Tabs both establish bromine, but they consume your bromide bank differently. Heavy reliance on granular (which carries its own bromide) builds the reserve faster but can also push bromide levels high over a fill cycle, which means draining sooner. If you find you're refilling more often than every 3–4 months, shift more of your daily maintenance to tablets in the floater and reserve the granular for genuine fast-response situations. Balanced use of both keeps the bromide bank in the sweet spot all cycle long.

Specifications
  • Product: Leisure Time Brominating Granular Bromine Sanitizer
  • Form: Fast-dissolving granular
  • Active Ingredients: Sodium Dichloro-s-Triazinetrione, anhydrous (84.15%) + Sodium Bromide (14.7%)
  • Other Ingredients: 1.15%
  • Functions: Sanitize + shock + bromide reserve in one product
  • Application: Added directly to spa water with circulation running
  • Dose Rate (Start-Up / Maintenance): 1½ tsp (7.5 g) per 300 gallons
  • Dose Rate (Shock): 6 tsp (30 g) per 300 gallons
  • Target Bromine Residual: 2–4 ppm
  • Safety Ceiling: Do not re-enter above 8 ppm bromine
  • Target pH at Start-Up: 7.2–7.6
  • Sanitizer Compatibility: Bromine programs only; NOT compatible with biguanide systems
  • Spa Return Time: 15 minutes (once residual is in 2–4 ppm range)
  • Country of Origin: Made in USA
  • Brand: Leisure Time Spa Care
  • Hazmat Classification: Regulated oxidizer — ground shipping only; not eligible for air shipment (no AK, HI, or international air)
Compatibility

Brominating Granular is formulated for residential spas and hot tubs running a bromine sanitizer program. The dichlor (chlorine) content makes it incompatible with biguanide systems.

  • Sanitizer programs: bromine systems only — works as a fast-response sanitizer and shock alongside Brom Tabs
  • Not compatible with: biguanide sanitizers (Baqua Spa, SoftSoak); the chlorine content cannot be combined with biguanide chemistry
  • Works alongside: ozone systems and mineral cartridges as a supplemental bromine source
  • Spa shells: acrylic, vinyl, fiberglass, rotomolded plastic, stainless steel — add directly to water with circulation running, never broadcast onto a dry shell
  • Equipment: safe on heater elements, circulation pumps, jet bodies, and standard cartridge filters at recommended dosing
  • Companion products: Brom Tabs (slow-dissolve daily maintenance), Reserve sodium bromide (dedicated bromide bank builder), Renew (non-chlorine shock alternative), and the full Leisure Time Simple Spa Care line — Metal Gon at fresh fills, Spa Up / Spa Down for pH, Defender for scale
  • Brand fit: works in Hot Spring, Caldera, Sundance, Jacuzzi, American Whirlpool, Bullfrog, and every other residential spa brand running a bromine program
Warranty Policy

Most products purchased from our online shop within the last 30 days are eligible for return. Please review our return policy to see the list of items that cannot be returned.

Some major items that are non-returnable:

  • Gift cards
  • Electronics
  • Pumps / Motors
  • Hot Tubs
  • Closeouts
  • Fireplaces
  • Electric Fireplaces
  • Massage Chairs
  • See return policy below for full list of non-returnables.

Leisure Time® Brand FAQs

Can I use Leisure Time products in any brand of hot tub?

Yes. Leisure Time spa chemicals are formulated to work safely in every major brand of residential hot tub, including Hot Spring, Caldera, Sundance, Jacuzzi, American Whirlpool, Bullfrog, and others. They're also compatible with every common spa shell material — acrylic, vinyl, fiberglass, rotomolded plastic, and stainless steel.

Will Leisure Time chemicals work with my sanitizer system?

The Leisure Time line is built for universal sanitizer compatibility. Products work with chlorine, bromine, ozone, mineral cartridge systems (silver/copper), biguanide systems (Baqua Spa, SoftSoak), and salt-generated chlorine systems like the FreshWater Salt System. Specific product labels will note any exceptions.

Can I mix Leisure Time with pool chemicals or other spa brands?

We don't recommend it. Spa chemistry is sensitive, and mixing brands can lead to unpredictable interactions — cloudiness, foam, sanitizer interference, or staining. Leisure Time products are tested as a complete system; using them together gives you the most predictable results and the simplest weekly routine.

How long do Leisure Time products last in storage?

Most Leisure Time chemicals have a shelf life of 1 to 3 years when stored properly. Keep all spa chemicals in their original containers, sealed tightly, in a cool, dry, well-ventilated area away from direct sunlight, freezing temperatures, and other chemicals. Liquid products are most sensitive to temperature; granular products are more shelf-stable but should still be kept dry.

Are Leisure Time products safe for septic systems and drainage?

Yes — when spa water is properly diluted and drained according to local regulations, Leisure Time chemicals at residual levels are safe for typical municipal drainage. For homes on septic systems, drain spa water gradually over your lawn or landscape rather than dumping it all into the septic field at once. Always check local ordinances before draining.

How often do I need to drain and refill my spa when using Leisure Time?

Industry guidance is to drain and refill every 3 to 4 months for a typical 400-gallon residential spa, regardless of which chemical brand you use. Heavy use, lots of bathers, or high-temperature soaking can shorten that interval; light use can extend it. Regular use of Leisure Time clarifiers, filter care, and stain & scale products helps maintain water quality between fills, but no chemical regimen replaces a fresh refill on schedule.

About Leisure Time®

For more than 40 years, Leisure Time® has built spa-specific water care chemistry trusted by hot tub manufacturers, dealers, and homeowners across North America. Where pool chemicals are formulated for tens of thousands of gallons of cool, lightly used water, Leisure Time® products are engineered for the opposite extreme: small water volumes, sustained high temperatures, heavy bather loads, and powerful jet circulation. That combination puts dramatically more stress on water chemistry than a swimming pool ever sees, and it's why generic pool chemicals don't perform reliably in a spa.

The Leisure Time® line covers the complete water care picture — sanitization, water balance, clarity, stain and scale prevention, filter care, and spa surface care — and every product is designed to work together as part of the Simple Spa Care Program. That means no surprise interactions, no guesswork about what's compatible with what, and a predictable weekly routine that takes minutes instead of hours. The full Leisure Time® system works with chlorine, bromine, ozone, mineral cartridge, and biguanide sanitizing programs, and is safe for every common spa shell material.

Leisure Time® is manufactured in the USA and is one of the most widely recommended spa chemical brands in the industry — used by Hot Spring, Caldera, Sundance, Jacuzzi, American Whirlpool, Bullfrog, and many other major spa manufacturers as the dealer-recommended water care solution for their tubs.