HTH™ Pool Care Liquid Chlorine

2-in-1 Liquid Pool Chlorine Shock & Sanitizer

  • HTH Liquid Chlorine gallon front of pack
  • Child on a red and white inner tube in a pool with HTH Pool Care branding.

HTH™ Pool Care Liquid Chlorine

2-in-1 Liquid Pool Chlorine Shock & Sanitizer

HTH™ Pool Care Liquid Chlorine is a powerful, fast-acting liquid pool chlorine that keeps your water clean, clear, and confidently balanced.

  • This 2-in-1 liquid chlorine for pool formula works as both a sanitizer and shock, protecting your pool from bacteria, algae, and organic contaminants without overstabilizing or causing chlorine lock.
  • Simply add directly to your pool water for instant clarity.
  • Safe for all pool types, including vinyl-lined and saltwater systems, this trusted swimming pool liquid chlorine helps you stay in control of your pool’s sparkle.

HTH™ is Here to Help!

Product Benefits

Clean, clear water

HTH™ Liquid Chlorine Shock is a convenient, easy-to-use way to protect your swimming pool water from bacteria and algae.

2 in 1 Pool Shock Liquid Chlorine

The 2 in 1 liquid chlorine shock formula gives you the benefit of shocking and sanitizing without overstabilizing your swimming pool water.

Compatible with All Pools

This product is great for all pool types including vinyl-lined pools and saltwater systems.

You’re all clear with HTH™

For best results, use HTH™ 6-Way Pool Test Strips twice weekly to test and balance your swimming pool water and keep chlorine levels between 1 and 4 ppm.

How to Use

How to Use

Why You Should Use This Product: This liquid chlorine is an effective 2‑in‑1 sanitizer that kills bacteria and algae and can also be used as a shock treatment. It is easy to use and will not overstabilize pool water.

Before Use: This product degrades with age. Test chlorine levels regularly using an HTH Pool Care Test Kit or Test Strips and increase dosage as needed.

Always adjust total alkalinity before adjusting pH levels.

Application Instructions

Add the recommended dosage of this product directly to the pool in the evening to minimize chlorine loss from sunlight. With the pump running, slowly pour this product close to the surface of the water, preferably near a return inlet.

Test free available chlorine residual using a reliable test kit. Do not enter the pool until the free available chlorine level is 1–4 ppm.

Routine Chlorination

To maintain the pool, add this product according to the directions below. Frequency of addition will depend on temperature and number of swimmers.

Dosage Guidelines

Pool Size (Gallons) Unstabilized Pools Stabilized Pools
1,000 4 fl oz (1/2 cup) 2 fl oz (4 Tbsp)
2,500 10 fl oz (1 1/4 cups) 5 fl oz (2/3 cup)
5,000 20 fl oz (2 1/2 cups) 10 fl oz (1 1/4 cups)
10,000 40 fl oz (5 cups) 20 fl oz (2 1/2 cups)
20,000 80 fl oz (10 cups) 40 fl oz (5 cups)
30,000 120 fl oz (15 cups) 60 fl oz (7 1/2 cups)

Shock Treatment

As a preventative treatment, shock treat the pool once per week with HTH Pool Care Liquid Chlorine. Additional shock treatments may be necessary when water appears hazy or dull, after heavy swimmer use, or following heavy rainstorms.

Test free available chlorine using a test kit and do not enter the pool until chlorine levels return to 1–4 ppm.

Water Balance Guidelines

Parameter Acceptable Range
Total Alkalinity 60–100 ppm
pH 7.2–7.6
Calcium Hardness Above 200 ppm
Available Chlorine 1–4 ppm

Ingredients

Ingredients

Active Ingredient:

Sodium Hypochlorite: 10%

Other Ingredients: 90%

Total: 100%

Safety, Storage, and Disposal

Safety

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

Wear safety glasses or goggles and rubber gloves when handling.

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

Do not reuse or refill container. Rinse empty container thoroughly with water prior to disposal.

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

Frequently Asked Questions

  • What is HTH™ Liquid Chlorine used for?

    HTH™ Liquid Chlorine is a fast-acting sanitizer used to quickly raise chlorine levels, shock pools, and maintain day-to-day sanitation. It starts working immediately.

  • When should I use liquid chlorine instead of chlorine tablets?

    Use liquid chlorine when you need a quick chlorine boost, including after heavy rain, after a pool party, at the first sign of algae, or for shock treatments. Tablets are better for slow, steady day-to-day maintenance.

  • How do I add liquid chlorine to my pool?

    Pour liquid chlorine slowly around the edge of the pool near the return jets, with the pump running, preferably after sunset to reduce chlorine loss from sunlight. Allow 4–6 hours of circulation before retesting chlorine levels.

  • Does liquid chlorine contain stabilizer?

    No. Liquid chlorine does not contain cyanuric acid (CYA), so it will not raise CYA levels. This is an advantage when CYA is already high, but it also means liquid chlorine loses strength quickly in direct sunlight when there is not enough stabilizer in the pool water.

  • How should I store HTH™ Liquid Chlorine safely?

    Store HTH™ Liquid Chlorine in a cool, shaded, well-ventilated area away from direct sunlight and heat. High temperatures cause the chlorine to lose strength more quickly and can cause the container to bulge or leak. Keep it in the original sealed container away from other chemicals, especially acids, which can react violently with liquid chlorine. HTH™ Liquid Chlorine has a shelf life of approximately 3–6 months under ideal conditions; check its strength before use.

  • How much liquid chlorine do I need to shock a pool?

    To shock a pool using liquid chlorine that contains 10–12.5% sodium hypochlorite, use approximately 1 gallon per 10,000 gallons to raise free chlorine by roughly 5–7 ppm. For severe algae or very green pool water, use 2 gallons per 10,000 gallons. Add it in the evening near the return jets with the pump running. Retest after 8 hours of circulation.

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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