HTH Pool Care Clear Defense — Liquid, 28 fl oz — Pool Algaecide for Water Treatment
HTH Pool Care Clear Defense — Liquid, 28 fl oz — Pool Algaecide for Water Treatment
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HTH Pool Care Clear Defense — Liquid, 28 fl oz — Pool Algaecide for Water Treatment

HTH Pool Care Clear Defense — Liquid, 28 fl oz — Pool Algaecide for Water TreatmentHTH Pool Care Clear Defense for Swimming Pools Liquid 28 oz
Size:28OZ
Pack Size:Single

Key item features

  • Triple Action: Features a 3-in-1 formula with powerful enzymes that actively prevents algae growth and removes the food source for algae.
  • Phosphate Elimination: Effectively removes phosphates from pool water, which are a primary nutrient for algae, contributing to clearer water.
  • Waterline Defense: Prevents the formation of unsightly waterline buildup and helps to avoid cloudy water conditions.
  • Broad Compatibility: Suitable for use in all types of swimming pools, including those with vinyl linings and saltwater systems.
  • Effortless Application: Designed for easy and convenient use, requiring a simple weekly application of 2 oz per 10,000 gallons into the skimmer.
  • Concentrated Liquid: Provided in a 28 fl oz concentrated liquid formula for efficient and fast-acting pool treatment.
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Current price is $19.9771.3 ¢/fl oz
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Customer ratings & reviews

4.6 out of 5 stars
stars73 ratings40 reviews
How item rating is calculated
  1. 5 stars81% (59)
  2. 4 stars8% (6)
  3. 3 stars4% (3)
  4. 2 stars0% (0)
  5. 1 star7% (5)

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Showing 1-3 of 40 reviews

May 17, 2026
Jacqueline
Top Reviewer
Item details
Size: 28OZ
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

The best algae killer I've ever used

This is the best algae killer. I've used on the pool. You can swim immediately after using it. It cleared up my pool in approximately three hours. My water was crystal clear and we were swimming immediately after using it about two more bottles to keep on hand for just in case this is a must have in your pool house.

Incentivized Review
Helpful?7GXVYM6GA4KI2631440093
Apr 27, 2026
dewitt
Item details
Size: 28OZ
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Added this product to the skimmer as directed along with my normal chemicals that go directly into the pool. wMy water went from very green to clear in less than two hours. That was a better result than the comparable chemical from the pool store at a much higher price. I'm sold.

Incentivized Review
Helpful?7GXVYM6GA4KI2631440093
May 17, 2026
Tia
Item details
Size: 28OZ
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

This is the second year we've bought this product and we feel the price is worth it because we struggled for years to find something that would get rid of the algae and keep it away and this has kept the water clear all season long!

Incentivized Review
Helpful?7GXVYM6GA4KI2631440093