HTH™ Pool Care Chlorine Granules Ultra

Pool Chlorine Granules

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HTH™ Pool Care Chlorine Granules Ultra

Pool Chlorine Granules

HTH™ Chlorine Granules Ultra delivers powerful sanitation and clarity in one simple step.

  • These fast-dissolving pool chlorine granules use a Cal-hypo formula that won’t add extra cyanuric acid (CYA), helping prevent overstabilization, cloudy water, and chlorine lock.
  • The all-in-one action kills bacteria and algae, clarifies and softens water, and helps prevent stain and scale—so your pool looks blue, bright, and inviting.
  • Safe for all pool types, including vinyl-lined and saltwater systems, this granular chlorine keeps maintenance easy and reliable. 

Product Benefits

All-In-One Convenience

One dose sanitizes, clarifies, softens, and helps prevent stain and scale for effortless pool care.

Brilliant Clarity in 24 Hours—

See brilliantly clear, blue water within 24 hours with powerful, fast-acting granular chlorine performance.

Algae & Bacteria Control

Kills algae and bacteria to keep pool water clean, healthy, and consistently swim-ready.

No CYA Buildup

Pool chlorine granules sanitize without adding CYA, helping avoid overstabilization and chlorine lock.

How to Use

How to Use

Why You Should Use This Product: This fast‑acting chlorine granule is an all‑in‑one sanitizer and shock treatment that kills bacteria and algae, softens and clarifies water, helps prevent stains and scale, and will not cause chlorine lock.

Before Use: Test pool water and adjust total alkalinity before adjusting pH levels.

Application Instructions

Use only a clean, dry scoop to measure this product. Use in a feeder or floater, or dissolve granules in a clean bucket of water and add evenly to the pool surface with the pump running. Never add water directly to this product.

Routine Chlorination

Use the following dosage recommendations based on pool size to maintain a chlorine residual of 1–4 ppm.

Routine Chlorination Dosage

Pool Size (Gallons) Unstabilized Pools Stabilized Pools
1,000 0.67 oz (1½ Tbsp) 0.40 oz (2½ Tbsp)
2,500 1.75 oz (3½ Tbsp) 1.02 oz (2 Tbsp)
5,000 3.5 oz 2 oz
10,000 7 oz 4 oz
15,000 10.5 oz 6 oz

Shock Treatment

As a preventative treatment or when pool water appears cloudy or dull, use the following dosage to shock the pool.

Shock Treatment Dosage

Pool Size (Gallons) Dosage (Ounces)
1,000 1.2 oz
2,000 2.4 oz
5,000 6.0 oz
10,000 12 oz
15,000 18 oz

Ingredients

Ingredients

Active Ingredient:

Calcium Hypochlorite: 56%

Other Ingredients: 44%

Total: 100%

Safety, Storage, and Disposal

Safety

Use this product only as directed. Avoid contact with eyes and skin, and avoid breathing dust.

Wear protective eyewear and gloves when handling, and wash hands thoroughly after use.

Mix only with water as directed. Do not mix with other chemicals.

For complete safety information, warnings, and first aid instructions, refer to the product label.

Storage and Disposal

Keep this product dry in its tightly closed container when not in use. Store in a cool, dry, well‑ventilated area away from heat or open flame.

Use entire contents when possible. Rinse empty container thoroughly with water prior to disposal.

For disposal of a contaminated or decomposing product, refer to the product label.

Reviews

 

Quick Pool Tips

  • Always read product label directions prior to using and use only as directed

  • Always add chemicals to pool water, never the other way around

  • Never add chemicals to pool water when people are in the pool

  • Warning symbol with a triangle and exclamation mark on a blue background

    Never mix products together

  • Always store pool products in a cool, dry location and out of direct sunlight