Clorox Pool&Spa XtraBlue 3-Inch Chlorinating Tablets, Outdoor Pool Sanitizer for Backyard & Patio Swim Areas
Clorox Pool&Spa XtraBlue 3-Inch Chlorinating Tablets, Outdoor Pool Sanitizer for Backyard & Patio Swim Areas
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Why you'll love it
- Trusted Clorox brand name backed by a dedicated Pool&Spa product line
- Slow-dissolving 3-inch tablets reduce the frequency of pool maintenance
- Built-in chlorine stabilizer extends tablet life in direct sunlight
- Safe for all pool surfaces eliminating guesswork about liner or finish damage
- Companion Clorox Pool App replaces guesswork with personalized dosage and testing guidance
- Available in 5 lb, 25 lb, and 35 lb sizes to match pool volume and refill cadence
Perfect for
- Weekly routine pool sanitization to kill bacteria and prevent algae
- Algae outbreak treatment and prevention across all pool types (green, mustard, black)
- Long-term water maintenance during peak swimming season
- Bulk chlorine supply for high-volume residential or multi-pool properties
- Pre-season pool opening and shock support
Surface Protection
Prevents equipment corrosion, surface stains and scale.
Long-Lasting Sunlight Protection
Enriched with a chlorine stabilizer to extend the life of your clean.
Silky Smooth Feeling Water
Contains conditioners for silky smooth feeling water.
Weekly-Use
Maintain 1 to 4 parts-per-million of Free Chlorine by applying tablets weekly.
Easy Application
Apply chlorinating tablets to your feeder, skimmer or floater.
Test Weekly
Your pool chemistry can change quickly. Test your pool water weekly to ensure your chlorine and pH remain within optimal swimming ranges.
Product Information
Cleans Water & Stops Algae: Kills harmful bacteria and prevents equipment corrosion, scale and stains. Kills and prevents all types of swimming pool algae (green, mustard, black)
Long-lasting sunlight protection: Contains chlorine stabilizer to extend the life of your clean
Creates Silky Smooth Feeling Water: XTRABLUE chlorinating tablets contain conditioners for silky smooth feeling water
Usage: Apply 2 tablets weekly to treat 10,000 gallons of water, add more tablets as needed to maintain adequate sanitation. Safe for all swimming pool surfaces, including vinyl, plaster, fiberglass, and tile.
Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations
Clorox Pool&Spa XtraBlue 3” Swimming Pool Chlorinating Tablets, Kills Bacteria & Stops Algae (25 LB);24225CLXW.Global Trade Identification Number: 00810821021463
Number of Items: 1
Item Type Name: Long Lasting Chlorinating Tablets
Included Components: Clorox Pool&Spa XtraBlue 3" Long Lasting Chlorinating Tablets 25 lb
Item Form: Tablet
Product Benefits: Kills Bacteria
Item Weight: 25 pounds
Frequently Asked Questions
Will these tablets hold up in direct sunlight and high outdoor heat without dissolving too fast?
Yes. Each 3-inch Clorox Pool&Spa XtraBlue tablet is slow-dissolving and includes built-in cyanuric acid as a chlorine stabilizer, which protects active chlorine from UV breakdown so your outdoor pool stays sanitized even on the brightest summer days.
Can I use these outdoor chlorinating tablets in an above-ground backyard pool?
Absolutely. The tablets are designed for both in-ground and above-ground backyard pools and dissolve at a controlled rate in any standard floating feeder, skimmer, or automatic chlorinator exposed to open air.
Do the tablets work in pools that get a lot of leaves and outdoor debris?
Yes. While no chlorine replaces manual skimming, the steady release of sanitizer from XtraBlue tablets helps keep outdoor pools resistant to the bacteria and algae that thrive when leaves, pollen, and yard debris are present.
Are these tablets portable enough to take to a vacation rental or remote pool property?
Yes. The 5 lb, 25 lb, and 35 lb buckets are sealed, stackable, and easy to transport, making them convenient for outdoor pool properties, rental homes, and any location where you need reliable chlorine shipped or hauled in.
Will rain or windy outdoor weather reduce how well the tablets sanitize?
Heavy rain can dilute pool water and lower chlorine demand, but the stabilized formula in XtraBlue tablets resists UV loss, and the Clorox Pool App helps you rebalance dosage after storms so your outdoor pool recovers quickly.
How do I use Clorox Pool&Spa XtraBlue 3-inch chlorinating tablets in my pool?
Place the tablets in a floating dispenser, skimmer basket, or automatic chlorinator — never directly in the pool. Use 2 tablets per 10,000 gallons of water per week, and adjust based on test results to keep chlorine levels between 1–4 ppm.
How long does one 3-inch tablet take to dissolve?
A single 3-inch XtraBlue tablet typically lasts 5 to 7 days depending on water temperature, pump run time, and sun exposure. Warmer water and longer pump cycles will cause faster dissolution.
How do I shock my pool in addition to using these tablets?
For routine weekly care, the tablets alone are usually sufficient. For algae outbreaks or after heavy use, complement with a Clorox Pool&Spa shock product, then resume tablet maintenance once chlorine levels return to 1–4 ppm.
Are these tablets compatible with saltwater pools and chlorine generators?
XtraBlue tablets are designed for traditional chlorine pools. They are not required for saltwater systems, but can be used alongside a generator to provide stabilized chlorine backup during high-demand periods.
Can I use these tablets in a spa or hot tub?
3-inch trichlor tablets are generally too large and too slow-dissolving for the small water volume of a spa or hot tub. For spas, use a chlorine product specifically labeled for spa use to avoid over-stabilization.
What comes in the bucket when I order?
Each order includes one sealed bucket of Clorox Pool&Spa XtraBlue 3-inch chlorinating tablets in your selected size (5 lb, 25 lb, or 35 lb). A floating feeder, test strips, and the app download are sold or accessed separately.
Is it normal for tablets to have a slight color or odor variation between batches?
Yes. Minor variations in color or scent can occur between production batches of trichlor tablets and do not affect chlorine strength, dissolution rate, or sanitizing performance.
How should I store the bucket to keep the tablets effective?
Store the bucket in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and incompatible chemicals. Keep the lid tightly sealed and out of reach of children and pets.
What is the difference between 3-inch chlorine tablets and 1-inch chlorine tablets?
3-inch tablets dissolve more slowly than 1-inch tablets, which means fewer refills and more consistent chlorine levels. 1-inch tabs are typically used in smaller floaters or above-ground pools, while 3-inch tabs are the standard for in-ground residential and commercial pools.
