HTH™ Pool Care Phosphate Remover

Algae Prevention

  • HTH Phosphate Remover 32 fl oz front bottle, concentrated fast-acting specialty treatment to eliminate algae-feeding phosphates.
  • 32 oz.
  • HTH Pool Care emphasizing removing phosphates to prevent algae growth before it starts.
  • Swimming pool view illustrating that HTH treatments are safe for vinyl, plaster, fiberglass, and saltwater pools.
  • HTH Pool Care promotional banner showing crystal clear water all season long with consistent phosphate control.
  • Hand pouring HTH Phosphate Remover into a swimming pool to start treatment with the correct dose.
  • HTH Pool Care Phosphate Remover product group showcasing various compatible pool care items and testing supplies.
  • HTH Pool Care graphic highlighting simple weekly maintenance with a 7 days repeat weekly calendar icon.
  • Family enjoying a clear and inviting pool that is safe to swim right after treatment.

HTH™ Pool Care Phosphate Remover

Algae Prevention

HTH™ Pool Care Phosphate Remover eliminates phosphates that feed algae and reduce sanitizer effectiveness. It works quickly to help prevent cloudy or green water and keep chlorine or bromine working efficiently.

  • Weekly use: 2 fl oz per 10,000 gallons
  • Safe for all pool types, including vinyl-lined and saltwater systems
  • Drops phosphates for easy filter removal

**Note: Phosphate levels above 200–500 ppb can make algae harder to control.

Product Benefits

Stops Algae at the Source

Pool phosphate remover starves algae of food before blooms can start.


Boosts Sanitizer Performance

Removing phosphates in pool water helps chlorine and bromine work more efficiently.


All-Pool Compatibility

Effective in vinyl, plaster, fiberglass, and saltwater swimming pool systems.


Easy Weekly Dose

Add 2 fl oz per 10,000 gallons for routine maintenance and ongoing algae prevention.

How to Use

How to Use

Why You Should Use This Product: Phosphate Remover eliminates phosphates that feed algae, helping keep pool water clear and allowing chlorine and salt systems to work more efficiently. The fast‑acting, concentrated formula begins working immediately.

Before Use: Clean or backwash the filter. Test phosphate levels using an appropriate phosphate test kit.

Application Instructions

  1. Clean or backwash the filter before treatment.
  2. Test phosphate levels to determine the amount of product needed.
  3. With the pump running, slowly pour the recommended amount evenly into the pool over a wide area.
  4. Run the filter continuously for at least 24 hours.
  5. Backwash the filter after 24 hours.
  6. After 48 hours, retest phosphate levels. If levels are still above 125 ppb, repeat treatment.

Cloudiness may occur temporarily after treatment. To clear water more quickly, use a compatible pool clarifier.

Dosage Guide

Pool Capacity (Gallons) 125 ppb 250 ppb 500 ppb 1,000 ppb
5,000 1 fl oz 2 fl oz 4 fl oz 8 fl oz
10,000 2 fl oz 4 fl oz 8 fl oz 16 fl oz
15,000 3 fl oz 6 fl oz 12 fl oz 24 fl oz
20,000 4 fl oz 8 fl oz 16 fl oz 32 fl oz

Weekly Maintenance

Add 1 fl oz of this product per 5,000 gallons of pool water each week to maintain phosphate levels below 125 ppb.

Ingredients

Ingredients

Active Ingredient:

Contains lanthanum chloride.

Safety, Storage, and Disposal

Safety

Use this product only as directed. Avoid contact with eyes and skin.

Wear protective eyewear and gloves when handling.

Do not mix this product with other chemicals.

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

First Aid

If product gets in eyes, rinse slowly and gently with water for 15–20 minutes and seek medical advice if irritation persists.

If on skin or clothing, remove contaminated clothing and rinse skin thoroughly with water.

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

Storage and Disposal

Keep product in its original, tightly closed container when not in use.

Store in a cool, dry place away from heat or open flame.

Use entire contents when possible. Dispose of empty 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.

Frequently Asked Questions

  • What are phosphates, and why should I remove them from my pool?

    Phosphates are nutrients found in fertilizers, leaves, fill water, and swimmer waste that feed algae growth. High phosphate levels (above 200–500 ppb) can make it extremely difficult to control algae, even with adequate chlorine. HTH™ Pool Care Phosphate Remover drops phosphates to near zero, depriving algae of their food source.

  • How do I know if my pool has high phosphate levels?

    The most reliable way to test phosphates is with a phosphate test kit or test strips designed for phosphates. Standard 6-way test strips do not measure phosphates. Signs of high phosphates include chronic algae problems despite adequate chlorine, rapid chlorine consumption, and water that is hard to keep clear. Levels above 200–500 ppb are considered elevated.

  • How does HTH Pool Care Phosphate Remover work?

    HTH™ Pool Care Phosphate Remover uses a lanthanum-based formula that binds to phosphates in the water and causes them to precipitate as a fine white cloud that the filter removes. This process deprives algae of a primary food source, making chlorine more effective at preventing and controlling algae growth.

  • How do I use HTH Pool Care Phosphate Remover?

    Add the label-directed dose evenly to the pool with the pump running. The water may temporarily become milky white; this is normal and means the product is working. Run the filter continuously for at least 24 hours, then backwash or clean the filter as directed. Retest after 48 hours and repeat treatment if phosphate levels remain elevated. A compatible pool clarifier can help clear temporary cloudiness more quickly.

  • Will removing phosphates replace the need for algaecide?

    Phosphate removal significantly reduces algae’s food supply, making it harder for algae to grow and allowing chlorine to work more efficiently. However, it does not replace algaecide or chlorine; it complements them. In pools with chronic algae issues or very high phosphate levels, removing phosphates can be the missing piece needed to prevent recurring algae problems.

  • Where do phosphates in pool water come from?

    Phosphates enter pool water from many sources: fertilizer runoff, windblown grass clippings, leaves and organic debris, swimmer waste such as sweat and urine, some pool chemicals and algaecides, tap water in some municipalities, and rainwater. Pools near gardens, lawns, or heavily landscaped areas tend to accumulate phosphates fastest.

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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