HTH™ Pool Care Algae Guard+ Ultra: Expert Strength Pool Algaecide

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HTH™ Pool Care Algae Guard+ Ultra is our most powerful pool algaecide, engineered to eliminate and prevent even the toughest algae.

  • This non-foaming, non-staining algaecide for pools works fast to kill stubborn green, black, and mustard algae while preventing regrowth for long-lasting clarity and confidence.
  • Add it directly to your pool water! No waiting, no complications, and enjoy a clean, clear, swim-ready pool in minutes. 
  • Safe for all pool types, including vinyl-lined and saltwater systems, this professional-grade swimming pool algae cleaner gives you certainty all season long.

Our strongest algae control

Kill, prevent, and protect against regrowth of heavy green, black and mustard swimming pool algae for up to 3 months with HTH's pool algae remover.

Non-foaming, fast-acting

Add HTH™ Algae Guard Ultra directly to your swimming pool water and swim right away!

Compatible with all pools

This non-staining formula is great for all swimming pools including vinyl-lined and salt water systems.

You’re all clear with HTH™

For best results, use HTH™ Algae Guard Ultra every 3 months. Works great with HTH™ Shock products.

How to use

HTH™ Algae Guard+ Ultra: Expert Strength Pool Algaecide

1. Measure Correct Amount

Add 16 fl oz for 10,000 gal of swimming pool water for up to 3 months of protection.

Add 16 fl oz for 10,000 gal of swimming pool water for up to 3 months of protection.

2. Add Directly to Pool Water

Make sure the pump is running.

Make sure the pump is running.

3. Use Every 3 Months

For best results, add HTH™ Algae Guard Ultra every 3 months.

For best results, add HTH™ Algae Guard Ultra every 3 months.