Leisure Time Spa 56 2 lb | Chlorine Sanitizer

• (1) Leisure Time Spa 56 Chlorinating Granules — 2 lb (32 oz) bottle of fast-dissolving granular dichlor chlorine
• Child-resistant cap with measured-pour opening
• Full dosing chart and application directions printed on the bottle label

• 99% sodium dichlor — 55% available chlorine, one of the most concentrated forms available for residential spa use
• EPA-approved sanitizer formulated specifically for hot water environments
• Convenient 2 lb size — fresh stock turnover, ideal for new owners, smaller spas, or non-climate-controlled storage
• Dual-purpose — same product handles daily residual maintenance and periodic superchlorination
• Fast-dissolving granular — fully dissolves in seconds with jets running, no pre-mixing required
• Built-in stabilization — dichlor includes cyanuric acid that protects chlorine from UV and heat breakdown
• Near-neutral pH — won't crash spa pH the way some unstabilized chlorine forms can
• Kills bacteria, viruses, and algae on contact at the recommended residual range
• Made in the USA by Leisure Time, a trusted name in spa chemistry for over 40 years

The active ingredient in Spa 56 — sodium dichloro-s-triazinetrione dihydrate, or "dichlor" for short — releases hypochlorous acid (HOCl) when it dissolves in spa water. Hypochlorous acid is the actual sanitizing agent: it penetrates the cell membranes of bacteria, viruses, and other microorganisms and destroys them on contact, usually within seconds at a 2–3 ppm residual level. The reaction produces only harmless byproducts (chloride salts and water) that don't build up or affect water quality.

Dichlor has two technical advantages that make it the preferred chlorine form for spas. First, it dissolves at a near-neutral pH of around 6.7, so it doesn't drag spa pH downward like calcium hypochlorite does or push it upward like liquid bleach. Your pH stays stable from one dose to the next, which means less time chasing balance and a sanitizer that always operates in its optimal pH window. Second, dichlor incorporates a built-in cyanuric acid stabilizer (formed during dissolution) that shields chlorine molecules from UV light, heat, and aeration — the three forces that destroy unstabilized chlorine fastest in a hot tub environment.

There's one trade-off worth understanding: cyanuric acid accumulates with continued use. After roughly 3–4 months of dichlor-only sanitation, levels can reach the point where chlorine's kill speed slows down — a phenomenon called "chlorine lock." This is one of the structural reasons why every hot tub manufacturer recommends a complete drain and refill every 3–4 months. Following that schedule resets the stabilizer level, keeps Spa 56 working at full strength, and prevents the slow water-quality decline that creeps in toward the end of a fill cycle.

Pro Tip: Owners new to chlorine programs often overdose at start-up because they want to be safe. Resist the urge. Spa 56 is fast-acting and concentrated — a ½ oz. dose per 500 gallons will reach 2–3 ppm residual within minutes, and adding more just means waiting longer before you can get in (chlorine above 5 ppm is irritating to skin and eyes). Start with the label dose, retest after 5 minutes, and add more only if needed. Small doses, retest, repeat is always the right pattern.

Start-Up (Fresh Fill)

1. Clean spa surfaces and rinse or replace the filter cartridge before filling.
2. Fill the spa with fresh water. For well water or fill water containing dissolved metals, treat with Metal Gon at this stage.
3. Balance pH (7.2–7.8) and total alkalinity (80–120 ppm) before adding chlorine.
4. Add ½ oz. of Spa 56 per 500 gallons of spa water (approximately ⅓ oz. for a typical 400-gallon spa) with the jets running.
5. Circulate at least 5 minutes, then test residual chlorine. Target: 2–3 ppm.
6. If residual is below 2 ppm, add another partial dose and retest.
7. Spa is ready to use once residual chlorine reads between 2 and 3 ppm.

Daily / As-Needed Maintenance

1. Test residual chlorine every 2–3 days, and always after heavy bather use.
2. When residual drops below 2 ppm, add ½ oz. of Spa 56 per 500 gallons.
3. Broadcast granules evenly across the water surface with jets running.
4. Wait at least 5 minutes for full dissolution and mixing before retesting.
5. Maintain residual at 2–3 ppm continuously between uses.

Superchlorination (Every 2–4 Weeks)

1. Confirm pH and alkalinity are in range before superchlorinating.
2. Add 1 oz. of Spa 56 per 500 gallons of spa water — double the standard maintenance dose.
3. Run jets with the cover off for 15 minutes, then leave cover off until residual chlorine drops back to 2–3 ppm before entering.
4. Superchlorinate after heavy bather load events, parties, or visible water quality decline.

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 chlorine absorbs moisture from the air and degrades quickly if left open
• Keep out of reach of children and pets
• Never mix dry chlorine with other chemicals — including other chlorine products, bromine, biguanide, 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: The 2 lb size pairs especially well with owners who soak 2–4 times per week. At that bather rate, you'll work through the bottle in roughly the same window as your drain-and-refill cycle — meaning you finish the chlorine right around the time you'd be starting fresh anyway. That natural alignment eliminates leftover product sitting in storage between fills, when humidity and temperature swings can quietly degrade what's left in the bottle.

• Product: Leisure Time Spa 56 Chlorinating Granules
• Size: 2 lb (32 oz / 907 g) bottle
• Form: Fast-dissolving granular
• Active Ingredient: Sodium Dichloro-s-Triazinetrione Dihydrate (99%)
• Available Chlorine: 55%
• EPA Approved: Yes
• Application: Daily or as-needed residual maintenance, plus superchlorination every 2–4 weeks
• Dose Rate (Maintenance): ½ oz. per 500 gallons
• Dose Rate (Superchlorination): 1 oz. per 500 gallons
• Treatment Capacity (2 lb): Approximately 64 standard maintenance doses
• Typical Use Window: 2–3 months for a standard 400-gallon residential spa
• Target Chlorine Residual: 2–3 ppm
• Target pH Range: 7.2–7.8
• Target Alkalinity Range: 80–120 ppm
• Sanitizer Compatibility: Chlorine-program spas; NOT compatible with biguanide systems (Baqua Spa, SoftSoak)
• 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)

Spa 56 is designed for residential spas and hot tubs running a chlorine sanitizer program. Not compatible with biguanide-based systems (Baqua Spa, SoftSoak) — chlorine cannot be combined with biguanide chemistry under any circumstances.

• Sanitizer programs: primary sanitizer for chlorine programs; also usable as a chlorine shock supplement for bromine systems
• Not compatible with: biguanide sanitizers (Baqua Spa, SoftSoak) — these systems require their own dedicated chemistry
• Works alongside: ozone systems, mineral cartridges (silver/copper), and salt-generated chlorine systems where supplemental chlorine is needed
• Spa shells: acrylic, vinyl, fiberglass, rotomolded plastic, stainless steel
• Equipment: safe on heater elements, circulation pumps, jet bodies, and standard cartridge filters at recommended doses
• Companion products: works with the full Leisure Time Simple Spa Care line — Spa Up / Spa Down for pH, alkalinity increasers for buffering, Defender for scale, Metal Gon at fresh fills, Bright & Clear for clarity, and Renew when a chlorine-free shock makes sense
• Brand fit: works in Hot Spring, Caldera, Sundance, Jacuzzi, American Whirlpool, Bullfrog, and every other residential spa brand