HTH™ Pool Care 1" Chlorine Tabs

Chlorine Tablets for Pool Floaters, Feeders & Skimmers

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HTH™ Pool Care 1" Chlorine Tabs

Chlorine Tablets for Pool Floaters, Feeders & Skimmers

HTH™ 1 Inch Chlorine Tablets are slow-dissolving, UV-stabilized pool sanitizer tablets sized for smaller and above-ground pools.

  • Each tablet lasts 5-7 days
  • Maintains free chlorine at 1-4 ppm
  • Built-in UV stabilizer prevents sun loss
  • Start with 1-2 tablets per 5,000 gallons per week
  • Use in floater, feeder, or skimmer basket only. Never place on pool surfaces
  • Choose 1" for small/above-ground pools, 3" for larger in-ground pools
  • Do not use in hot tubs or spas

Product Benefits

Slow, Steady Sanitation

Each 1 inch chlorine tablet dissolves over 5-7 days to maintain a free chlorine residual of 1-4 ppm. This continuous sanitation kills bacteria and prevents algae growth between weekly maintenance checks. Hot weather, heavy bather loads, and long sunny stretches will dissolve tablets faster, so adjust your feeder rate as needed.

UV-Stabilized for Outdoor Pools

These pool chlorine tablets 1 inch contain built-in cyanuric acid that protects chlorine from being burned off by sunlight. Without UV stabilization, outdoor pools can lose up to 90% of their chlorine within two hours of direct sun exposure.

Flexible Application Options

Use these chlorine tablets for floater, in-line automatic feeders, or directly in a skimmer basket. Never throw tablets directly into the pool or let them sit on the liner, floor, or walls. Concentrated contact bleaches surfaces and can permanently damage vinyl liners. Do not use in feeders or floaters that have previously held other chlorine products like Cal Hypo.

Sized for Smaller Pools and Hot Tub Safety

1 inch tablets are designed for above-ground pools, smaller in-ground pools, and feeders rated for 1 inch tabs. Use 3 inch tablets for larger pools where a single tablet treats up to 10,000 gallons. Never use any size trichlor tablet in a hot tub or spa. Their highly acidic pH (~2.8) damages acrylic shells, degrades seals, and rapidly over-stabilizes the small water volume.

How to Use

How to Use

Why You Should Use This Product: When used as directed, this product is an effective swimming pool water sanitizer. It provides a steady source of available chlorine to help destroy bacteria, prevent algae, and keep pool water clean and clear.

Before Use: Test pool water to ensure proper water balance. Do not allow this product to get damp or wet before use.

Application Instructions

  1. Place this product in an automatic feeder, floating dispenser designed for this product, or in the skimmer basket.
  2. If using a skimmer, ensure the skimmer 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 an HTH test kit or test strips.

Important Use Instructions: 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 plastic pool linings or metal objects.

Ingredients

Ingredients

Active Ingredient:

Trichloro‑s‑Triazinetrione: 92.4%

Other Ingredients: 7.6%

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 read and follow the directions on 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 offer for recycling or dispose 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