HTH 3-inch Advanced Chlorine Tablets — Tablet, 5 lb — Pool Sanitizer for Routine Chlorination
HTH 3-inch Advanced Chlorine Tablets — Tablet, 5 lb — Pool Sanitizer for Routine Chlorination
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HTH 3-inch Advanced Chlorine Tablets — Tablet, 5 lb — Pool Sanitizer for Routine Chlorination

4.5 stars out of 5368 reviews
(4.5)|
5,368 ratings

Key item features

  • Triple Action: These 3-inch advanced chlorine tablets function as a sanitizer, clarifier, and algaecide, effectively destroying bacteria and algae for clean pool water.
  • Extended Protection: Sun-protected for longer chlorine life, these slow-dissolving tablets last up to one week, providing continuous pool sanitation.
  • Versatile Application: Designed for use in a floater, feeder, or skimmer basket, these tablets are suitable for all swimming pool types, including vinyl-lined and saltwater systems.
  • Simple Dosing: Each convenient one-dose tablet treats 10,000 gallons of water, simplifying routine chlorination.
  • Clear Water: The tablets contribute to clear blue water by protecting against bacteria, algae, and other organisms.
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was $44.99
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4.5 out of 5 stars
stars5,368 ratings1,405 reviews
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Showing 1-3 of 1,405 reviews

Nov 20, 2025
anonymous
Top Reviewer
Item details
Size: 25 lbs
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Will not disappoint!

This a great product and I do recommend it. The container itself has many great features. First, the container is fantastic. It's a tub with an open/close lid that protects the product and seals in the chemical smells of chlorine. We've been using this product for six months without any issues. It dissolves properly in the chlorine dispenser and doesn't produce algae.

Helpful?c5f98320-0b0d-11f1-85c1-b9be452911c7492355590
Jul 6, 2023
Wenchett
Item details
Size: 5 lbs
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

HTH Advanced works! Keeps pool clean and clear.

I bought the 25 pound HTH Advanced 3" tabs because it was best value for money and it was time to give a different brand a try. Ordered online and picked up in store. The name brand that I had used for previous 4 years did not keep my pool clean, clear, nor free of algae even though it had algaecide and chlorine in tabs. I had constant problems with that brand and spent a lot of money and time trying to keep pool clear and chlorine level up. Anyhow, I've been using the HTH Advanced for 2 months now. I am very pleased with HTH Advanced as it has kept pool clear and free of algae, even in the 100 degree humid weather we've had for past few weeks. Chlorine level is where it's supposed to be. I use 2 chlorine tablet floats in 18'x52" pool, one is half closed at bottom. I only need to refill floats every 7 to 10 days depending on weather and pool use.

Helpful?c5f98320-0b0d-11f1-85c1-b9be452911c7492355590
Aug 10, 2025
Rachel
Item details
Size: 5 lbs
Multipack quantity: 1
4 out of 5 stars review

Verified Purchase

the tabs work great, my 1st year using them and i like how they dissolve slowly. i used to just put liquid chlorine in and sunce using these i havent had to put any liquid in. they keep my 18' round pool at perfect chlorine levels. however, the stupid box. i have arthritis in both my hands and carpal tunnel so it is literally impossible to open the darn box. I have to grab tools to open the stupid box and my hands hurt all day afterwards. I will be looking for a product that doesnt require me to injure myself just to open it

Helpful?c5f98320-0b0d-11f1-85c1-b9be452911c7492355590