GLB 5LB 1" Chlorine Tablets – Stabilized Pool Sanitizer

Compact, Reliable Chlorination for Small Pools & Spas

Keeping pool and spa water safe, clear, and inviting requires consistent chlorination. That’s where GLB 5LB 1" Chlorine Tablets (71239A) shine. Packaged in a handy 5LB container, these stabilized trichlor tablets offer a slow and steady release of chlorine. This helps keep your water clean and safe from harmful bacteria, algae, and organic contaminants.

These 1" chlorine tablets are perfect for spas, hot tubs, and small above-ground pools. They are also suitable for feeders and floaters that require precise dosing. This is different from larger 3" tablets, which are made for big in-ground pools. GLB’s trusted formulation delivers long-lasting sanitation in a format that’s easy to handle and store.

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Why Choose GLB 1" Chlorine Tablets?

GLB is a trusted brand among pool owners and professionals, known for quality formulations and reliable performance. These 1" tablets are a versatile option for smaller applications, offering:

• Precise dosing – ideal for spas, feeders, and smaller pools

• Stabilized chlorine – includes cyanuric acid (CYA) to prevent chlorine loss from UV rays

• Slow, even dissolving – steady chlorine levels without constant adjustment

• Compact 5LB pail – convenient storage and handling compared to bulk buckets

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Key Benefits

• Daily sanitation – protects against algae, bacteria, and viruses

• UV shielded – stabilized with CYA for outdoor use

• Smaller format – faster-dissolving 1" size for precise dosing

• Easy storage – lightweight 5LB container, perfect for homeowners

• Trusted GLB brand – consistent, professional-grade chlorine tablets

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How GLB 1" Tablets Work

Each tablet contains trichloro-s-triazinetrione, a stabilized form of chlorine. As the tablets dissolve, they release free available chlorine (FAC), killing contaminants and oxidizing organic matter. The stabilizer ensures chlorine remains active longer under sunlight, making them highly effective for outdoor use.

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Application Instructions

1. Test pool or spa water chemistry before use (pH 7.2–7.6, alkalinity 80–120 ppm, stabilizer 30–50 ppm).

2. Place tablets in a floater, feeder, or skimmer basket.

3. Maintain chlorine residual between 1–4 ppm at all times.

4. Add more tablets as they dissolve, typically every 3–5 days depending on water temperature and usage.

⚠️ Safety Note: Never place tablets directly on pool surfaces. Never mix with other chlorinating compounds such as calcium hypochlorite shock.

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GLB 1" Tablets vs. 3" Tablets

• 1" Tablets (this product):

  • Smaller size, faster-dissolving

  • Ideal for spas, feeders, and small pools

  • Provides precise control over dosing

• 3" Tablets (GLB Triple Tab):

  • Larger, longer-lasting

  • Best for large residential or commercial pools

  • Requires fewer tablets but less dosing flexibility

For spas and smaller bodies of water, 1" tablets are the better choice for controlled sanitation.

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Comparison with Other Chlorine Options

• Liquid Chlorine: Quick but unstable; dissipates quickly, requires frequent additions.

• Cal Hypo Shock: Strong and fast, but meant for periodic shocking, not continuous sanitation.

• Non-Chlorine Shock: Good for oxidizing organics but doesn’t sanitize.

GLB 1" Tablets give you daily stabilized chlorination, bridging the gap between precision dosing and long-term sanitation.

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Safe Storage & Handling

• Store in a cool, dry, ventilated area away from heat or open flame

• Keep lid tightly sealed after each use

• Handle with gloves and protective eyewear

• Keep out of reach of children and pets

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Frequently Asked Questions (FAQ)

Q: How many 1" tablets should I use?
A: Start with 2–4 tablets per 10,000 gallons of water, placed in a floater or feeder. Adjust to maintain chlorine levels of 1–4 ppm.

Q: Can I use GLB 1" Tablets in a hot tub?
A: Yes, their smaller size makes them suitable for spas and hot tubs where larger tablets would oversanitize.

Q: Do these tablets contain stabilizer (CYA)?
A: Yes, they are stabilized to prevent chlorine loss from sunlight. Monitor CYA levels and maintain 30–50 ppm for best results.

Q: How long does one 1" tablet last?
A: Typically 3–5 days, depending on water temperature, bather load, and circulation.

Q: Why choose a 5LB pail instead of a bulk bucket?
A: The 5LB size is convenient for homeowners who need smaller, manageable quantities rather than commercial-scale containers.

Q: Are these tablets compatible with automatic chlorinators?
A: Yes, they work in feeders, floaters, and skimmers. Never mix with other chemical types.

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Key Features (Bullet List)

• 5LB pail of GLB 1" stabilized chlorine tablets

• Compact size for spas, hot tubs, and smaller pools

• Slow-dissolving, steady sanitization

• UV-protected stabilized formula

• Controls bacteria, algae, and organic contaminants

• Easy-to-handle container for homeowners

• Professional-grade reliability from GLB