HTH™ Pool Care 3" Chlor Tabs

Individually Wrapped Chlorine Tablets

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HTH™ Pool Care 3" Chlor Tabs

Individually Wrapped Chlorine Tablets

HTH™ 3 Inch Chlorine Tablets are slow-dissolving, UV-stabilized chlorine tablets built for in-ground and larger pools.

  • Each tablet lasts 5-7 days and treats up to 10,000 gallons
  • Maintains free chlorine at 1-4 ppm
  • Built-in UV stabilizer (trichlor) protects chlorine from sunlight
  • Start with 1 tablet per 10,000 gallons per week
  • Use in floater, feeder, or skimmer basket only. Never place on liners
  • Compatible with vinyl-lined and saltwater pools

Product Benefits

Long-Lasting Pool Sanitation

Each 3 inch chlorine tablet treats up to 10,000 gallons and lasts 5-7 days in a floater, feeder, or skimmer basket. Holds free chlorine at 1-4 ppm to fight bacteria and algae. Start with 1 tablet per 10,000 gallons per week and adjust based on test results. Hot weather and heavy bather loads may require more.

Built-In UV Protection

These stabilized chlorine tablets use trichlor, which contains cyanuric acid that shields chlorine from sun damage. This protection matters for outdoor pools, where UV rays can otherwise destroy most of your free chlorine within hours.

Troubleshooting Low Chlorine

If chlorine reads low while using tablets, there are three common causes. Stabilizer (CYA) may be too low. The pool may have a heavy organic load requiring a shock treatment. Or your feeder rate may need to be increased. Test all parameters and shock the pool if levels are off.

Watch for CYA Buildup Over the Season

Trichlor tablets contain approximately 57% cyanuric acid by weight. Every time you use a tablet, CYA gradually rises in your pool water. Test CYA monthly. When it reaches 50 ppm, switch to HTH™ Brilliance Cal Hypo Chlorine Tablets to avoid over-stabilization and chlorine lock. Use in a floater, feeder, or skimmer basket only. Never place tablets directly on a vinyl liner since concentrated contact will bleach the surface. Safe for vinyl-lined and saltwater pools when used as directed.

How to Use

How to Use

Why You Should Use This Product: This multi‑functional chlorine tablet sanitizes pool water, helps prevent algae, and includes added clarifier to keep water clear. One tablet treats up to 10,000 gallons.

Before Use: Test pool water and ensure proper water balance. Read all directions before application.

Application Instructions

  1. Place this product in an automatic feeder, floating dispenser, or skimmer basket designed for chlorine tablets.
  2. If using a skimmer, ensure it is clean and free of residue from other water treatment products.
  3. Run the pool pump a minimum of eight hours daily while this product is in use.
  4. Maintain a free available chlorine level of 1–4 ppm using a pool test kit or test strips.

Routine Chlorination

Add one tablet per 10,000 gallons of pool water each week, or as needed, to maintain the proper chlorine residual.

Important: Do not use this product in feeders or floaters that have been used with other chlorinating products. Do not throw tablets directly into the pool. Do not allow tablets to contact vinyl pool linings or metal objects.

Ingredients

Ingredients

Active Ingredients:

Trichloro‑s‑Triazinetrione: 93.5%

Zinc sulfate monohydrate: 3.5%

Other Ingredients: 3.0%

Total: 100.0%

Safety, Storage, and Disposal

Safety

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

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

Do not mix this product with other chemicals.

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

First Aid

If the product comes into contact with eyes or skin, rinse gently with water for 15–20 minutes and seek medical advice if irritation persists.

If swallowed or inhaled, contact a poison control center or medical professional immediately.

In case of emergency, call 1‑800‑654‑6911 and have the product container or label available.

Storage and Disposal

Keep product dry and store in its original, tightly closed container in a cool, well‑ventilated area away from heat or open flame.

Use entire contents, then triple rinse and dispose of the container in accordance with state and local regulations.

Do not reuse empty container.

For full storage, disposal, and emergency handling instructions, refer to the product label.

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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