

HTH Pool Care Chlorine Granules, Pool Chemical Sanitizer, 5 lbs, for Daily Chlorination
Key item features
- All-in-One Treatment: This Cal Hypo formula acts as a sanitizer and shock treatment, killing bacteria and algae while also clarifying, softening, and preventing stain and scale in pool water.
- Rapid Clarity: Achieve visibly sparkling blue water within 24 hours, ensuring your pool is clean and ready for enjoyment quickly.
- CYA-Free Formula: The Cal Hypo based formula provides chlorination without adding cyanuric acid (CYA), preventing overstabilization or chlorine lock.
- Multifunctional Action: Beyond sanitizing, it includes built-in algae control, a water clarifier, stain and scale prevention, a water softener, and a filter aid.
- Universal Compatibility: Suitable for all pool types, including vinyl-lined pools and salt water systems, offering versatile application.
- Usage Guidance: Apply granules evenly in the deepest part of the pool while the filter pump is running, then test chlorine levels with HTH 6-Way Test Strips.
Specs
- FormGranules
- Pool chemical typeChlorine Pool Chemicals
- Weight5 lb
- Product net content parent5 Pound
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About this item
Product details
Get a visible sparkle and crystal clear water in just 24 hours! Traditional chlorine products contain cyanuric acid (CYA). When too much CYA builds up, it can cause overstabilization or chlorine lock, cloud your water and cause algae growth. The Cal Hypo based formula in HTH® Chlorine Granules Ultra 5lbs provides chlorination without adding extra CYA for beautifully clear water all season. The all-in-1 action also kills bacteria and algae, clarifies and softens pool water, prevents stain and scale and provides a filter aid for the ultimate convenience in DIY pool care. This product is great for all pool types including vinyl-lined swimming pools and salt water systems.
How To Use HTH® Chlorine Granules Ultra Follow the on-pack dosage instructions according to the size of your pool. While the filter pump is running during the evening, use a clean, dry scoop to apply chlorine granules evenly over a wide area in the deepest part of the pool. Use a brush to disperse any granules that fall to the bottom of the pool. When granules have completely dissolved, use HTH® 6-Way Test Strips to test free available chlorine (FAC) residual. Do not enter your pool until the free available chlorine residual is 1 to 4 ppm.
- All-in-one sanitizer and shock treatment
- Kills bacteria and algae
- Softens, clarifies and prevents stain and scale
- Visibly sparkling blue water in 24 hours
About HTH® Pool Care
HTH® was developed with the pool owner in mind. We know that maintaining your pool water can be a lot of work. That’s why we’re here every step of the way, helping you clear the uncertainty from pool care. With economical, easy-to-use solutions, HTH® is designed to work hard so you’re prepared to tackle whatever life throws in your pool. From balancing your water to treating green water, we offer a full line of products to keep your pool water healthy and your swimmers happy.
Get the ultimate in pool care convenience with this all-in-one Cal Hypo formula. It sanitizes, controls algae, clarifies, softens pool water and even prevents stain and scale to keep your swimming pool clean, clear and ready for summer fun.
Visibly brilliant sparkle
This Cal Hypo based formula sanitizes and shock treats without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock.
Multifunctional, fast acting
The all-in-1 pool treatment has built-in algae control, pool water clarifier, stain and scale preventer, water softener and filter aid—all with visible sparkling blue results in 24 hours!
Compatible with all pools
This product is great for all pool types including vinyl-lined pools and salt water systems.
You’re all clear with HTH®
For best results, use HTH® 6-Way Test Strips twice weekly to test and balance your swimming pool water and keep chlorine levels between 1 and 4 ppm.
Specifications
Form
Pool chemical type
Weight
Product net content parent
Warranty
Warranty information
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
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Customer ratings & reviews
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Showing 1-3 of 88 reviews
Verified Purchase
Easy maintenance for clean water
Very easy maintenance that cleans our hot tub very well. I just fill up the cap 1-3 times depending on the condition of the water and it always cleans it. With a 220 gallon hot tub, the container lasts us the entire year, but obviously we don't use it much for about half the year with the summer heat.
Verified Purchase
Use HTH for a great pool.
Great pool product. HTH is the only product we will use! So happy Walmart carries it. Please continue.
Verified Purchase
Safe, Beautiful Spa Water
I've used HTH Granules in my swim spa for several years now. It keeps the water crystal clear and I rarely have to use any other chemicals. I highly recommend it.





