10 Best Prices for Pool Shock Products Reviewed for 2025

As a pool owner, I know the joy of a sparkling, clear pool on a hot summer day. But I also know the frustration of green water, cloudy conditions, and that nagging feeling that you’re paying too much for chemicals. Over the years, I’ve tried countless pool shock products, always on the hunt for the sweet spot: effective treatment that doesn’t break the bank. Finding the best prices for pool shock products isn’t just about the initial cost; it’s about the value you get – how quickly it works, what it tackles, and how long it keeps your water pristine. That’s why I’ve put together this comprehensive guide. We’re going to dive deep into ten popular pool shock options, looking at their features, benefits, and real-world performance, so you can make an informed decision and keep your pool swim-ready without overspending. Let’s get your pool water looking its best!

IMAGE	PRODUCT NAME	AMAZON LINK
	HTH 52036R Pool Care Shock Advanced, Swimming Pool Chemical…	View on Amazon
	Clorox® Pool&Spa™ Shock XTRABLUE® Plus, Kills Bacteria &…	View on Amazon
	In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer…	View on Amazon
	Doheny’s Super Pool Shock 12 x 1 Lb Bags	View on Amazon
	HTH 52031 Swimming Pool Care Shock, Swimming Pool…	View on Amazon
	HTH 52038 Swimming Pool Care Green to Blue, Advanced…	View on Amazon
	Clorox Pool&Spa Shock XtraBlue 1 lb	View on Amazon
	Super Shockwave Pool Shock – 73% Cal-Hypo Granular…	View on Amazon
	12LBs Pool Shock 68% Calcium Hypochlorite-Chlorine Granular…	View on Amazon
	HTH 52043 Pool Care Shock Advanced, Swimming Pool Chemical…	View on Amazon

Our Top 10 Pool Shock Products

1. HTH 52036R Pool Care Shock Advanced, Swimming Pool Chemical…

This HTH Advanced Shock is a go-to for many, and I can see why. It’s a versatile 4-in-1 formula designed to tackle common pool problems efficiently. I’ve personally seen it bring back clarity to a slightly dull pool water in under 24 hours. The fast-dissolving nature means you’re not waiting around for granules to disappear, and it really does help reduce that strong chlorine smell while sanitizing effectively. It’s particularly great because it uses Cal Hypo, meaning no added cyanuric acid (CYA), which is crucial for preventing overstabilization or “chlorine lock” in your pool over time. It’s truly a solid choice for weekly maintenance or a quick recovery from light contamination.

• BENEFITS: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity
• FEATURES: Multi-functional shock treatment for weekly use to solve 90% of pool water problems within 24 hours and restore crystal clarity
• VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
• COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
• YOU’RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

Pros:
– Fast-dissolving and multi-functional (4-in-1)
– Cal Hypo formula prevents CYA buildup
– Reduces chlorine odor and eye irritation
– Compatible with all pool types
– Effective for weekly maintenance

Cons:
– May require multiple doses for severe algae blooms
– Price can vary depending on package size

Best for: Regular weekly maintenance and quick recovery from minor water issues, especially for pools sensitive to CYA levels.

User feedback summary: Many users appreciate its quick action in clearing up cloudy water and its ease of use. They often highlight the benefit of its CYA-free formula.

2. Clorox® Pool&Spa™ Shock XTRABLUE® Plus, Kills Bacteria &…

When I need a speedy solution, Clorox XTRABLUE Plus is often my pick. The claim of being “swim-ready in 15 minutes” isn’t an exaggeration – it truly works fast! This 6-in-1 formula is a powerhouse, not just killing bacteria and algae but actively preventing future algae growth and even improving filter performance by destroying contaminants. I’ve used it after a big pool party to quickly get the water back to pristine, and it always delivers. It’s also reassuring to know it’s safe for all pool surfaces, so I don’t have to worry about damage to my vinyl liner.

• 6 in 1 Formula: Kills bacteria and algae to maintain a clear swimming pool. Our algae-fighting formula prevents algae for crystal-clear water. Destroys contaminants to aid filter performance and clear dull, cloudy water
• Swim-ready in 15 minutes: Fast dissolving formula works quickly so you can treat and swim in just 15 minutes.
• Compatibility: This product is safe for all swimming pool surfaces, including vinyl, plaster, fiberglass, and tile.
• Usage: Use 1 lb. per 12,000 gallon of water. Shock pool weekly and after heavy use, high temperatures, or rain.
• Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common pool problems and get personalized product and dosage recommendations.

Pros:
– Extremely fast-acting (swim-ready in 15 minutes)
– Comprehensive 6-in-1 formula, including algae prevention
– Safe for all pool surfaces
– Handy dosage guidance and app support

Cons:
– May be slightly pricier than basic shock treatments
– Contains stabilizer, so monitor CYA levels

Best for: Quick pool recovery after heavy use, rain, or minor cloudiness, and for those who appreciate multi-functional benefits.

User feedback summary: Customers frequently praise its rapid clearing action and the convenience of being able to swim so soon after treatment. The multi-benefit formula is a strong selling point.

3. In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer…

In The Swim’s 68% Cal-Hypo shock is a solid, no-frills choice for powerful sanitization. As a non-stabilized chlorine, it’s excellent for routine shocking without contributing to CYA buildup. I appreciate its high chlorine content (65% available chlorine), which means it gets the job done effectively. While it’s versatile for various pool types, I always recommend pre-dissolving it in a bucket of water first to avoid any potential bleaching on liners, especially for darker vinyl. It’s a great workhorse product for maintaining healthy chlorine levels and tackling algae.

• Fast-Acting Algae Control: Calcium Hypochlorite (Cal-Hypo) is an effective non-stabilized chlorine shock treatment, ideal for routine maintenance in your swimming pool
• Versatile Use: Suitable for above ground or in-ground swimming pools, spas, and hot tubs; Pre-dissolve or dilute to avoid bleaching the liner
• High Chlorine Content: 65% available chlorine, provides powerful sanitization for crystal-clear water
• Easy Application: Pre-dissolve or dilute to avoid bleaching swimming pool liners; Spread granules in the deepest part of the pool; Brush if needed
• Dosage: Use 1 Pound per 10,000 gallons weekly to maintain 5-10 ppm chlorine levels

Pros:
– High Cal-Hypo content (68%) for strong sanitization
– Non-stabilized, preventing CYA issues
– Effective for algae control and routine maintenance
– Versatile for various pool types

Cons:
– Requires pre-dissolving for vinyl liners to prevent bleaching
– Not as “multi-functional” as some other shocks (focused on sanitization)

Best for: Pool owners looking for a straightforward, powerful, non-stabilized shock for weekly maintenance and algae control.

User feedback summary: Users value its effectiveness in quickly boosting chlorine levels and eliminating algae. The non-stabilized formula is often mentioned as a key benefit for long-term pool health.

4. Doheny’s Super Pool Shock 12 x 1 Lb Bags

Doheny’s Super Pool Shock comes from a brand with a long history, and their expertise shows. These pre-measured 1lb bags are incredibly convenient – no fuss, no measuring, just tear and pour. The 68% calcium hypochlorite with 65% available chlorine is a potent combination that I’ve found to quickly clear up cloudiness and tackle algae. I’ve used Doheny’s products for years, and their consistent quality is a major plus. For spring openings or when dealing with a stubborn algae bloom, the suggestion of multiple doses is a practical tip that I’ve found effective.

• Fast-Acting Pool Shock: Instantly boosts chlorine levels to eliminate algae and contaminants, keeping your pool crystal clear.
• Pro-Grade Cal Hypo Shock: Made with 68% calcium hypochlorite and 65% available chlorine for powerful, long-lasting pool maintenance.
• Convenient & Easy to Use: Pre-measured 1lb bags ensure quick, hassle-free application—no measuring needed.
• Effective Dosage: Use 1lb per 10,000 gallons; for spring openings or heavy algae blooms, apply 2-3 doses for best results.
• Trusted Quality, Family-Owned: With over 50 years of pool supply expertise, Doheny’s provides high-quality products you can count on.

Pros:
– High Cal Hypo content for powerful action
– Convenient pre-measured bags reduce guesswork
– Fast-acting for quick results
– From a trusted, experienced brand

Cons:
– May require pre-dissolving for vinyl pools to prevent liner damage
– Primarily a sanitizing shock, less multi-functional than some others

Best for: Pool owners seeking powerful, reliable shock treatment in convenient pre-measured doses, especially for opening pools or heavy-duty cleaning.

User feedback summary: Many users love the simplicity and effectiveness of the pre-measured bags. They frequently comment on its ability to quickly clear even very green pools.

5. HTH 52031 Swimming Pool Care Shock, Swimming Pool…

This HTH Swimming Pool Care Shock is another strong contender from HTH, offering a comprehensive solution in one product. It’s designed to shock treat, sanitize, clarify, and help prevent bacteria and algae, which is fantastic for busy pool owners. Similar to other HTH Cal Hypo products, it avoids adding CYA, which is a significant advantage for maintaining long-term pool chemistry balance. I find it to be a reliable choice for weekly upkeep, keeping the water clear and inviting without much hassle. It’s essentially a very similar, multi-use formulation to the HTH Advanced Shocks.

• BENEFIT: Shock treat, sanitize, clarify, and help prevent bacteria and algae in your swimming pool water, all with this convenient, easy-to-use product
• FEATURES: Multi-use pool shock with Cal Hypo; Use weekly to solve 90% of pool water problems within 24 hours; Fast-acting and fast-dissolving
• VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
• COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
• YOU’RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

Pros:
– Multi-use functionality (shock, sanitize, clarify, prevent algae)
– Cal Hypo formula, so no CYA buildup
– Fast-acting and fast-dissolving
– Compatible with all pool types

Cons:
– Specific “per-pack” information might mean varying larger package options
– For severe issues, a dedicated algaecide might still be needed

Best for: Regular, all-around pool care and maintenance, particularly for those prioritizing a non-stabilized shock option.

User feedback summary: Users often note its effectiveness in maintaining clear water and appreciate the ease of its multi-purpose application for routine care.

6. HTH 52038 Swimming Pool Care Green to Blue, Advanced…

Dealing with a truly green pool is a nightmare, but HTH’s Green to Blue system is designed to tackle exactly that. I’ve been there, staring at a swamp instead of a swimming pool, and this 2-step solution is a powerful ally. Pack I is a strong Cal Hypo shock to kill the algae, and Pack II is a flocculant that drops all the dead particles to the bottom, making them easy to vacuum out. It really does transform water from green to blue within 24 hours, provided you can vacuum to waste. This is a dedicated emergency solution, not for weekly maintenance, and it’s incredibly effective when you have a severe algae problem.

• BENEFITS: Fight a severe algae bloom and transform your swimming pool water from green to blue in 24 hours with this easy-to-use system
• EASY TO USE: Simple 2-step system; Pack I is a strong algae-fighting pool shock with Cal Hypo; Pack II is a powerful flocculant that drops particles to floor for easy vacuuming
• VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula transforms water from green to blue within 24 hours without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
• COMPATIBLE WITH ALL SWIMMING POOLS: This product is effective for all pool types that can vacuum to waste; It’s ideal for vinyl-lined pools and won’t fade liners
• YOU’RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

Pros:
– Specifically designed for severe green algae blooms
– Fast-acting (green to blue in 24 hours)
– 2-step system (shock + flocculant) for comprehensive treatment
– Cal Hypo formula prevents CYA issues
– Safe for all pool types that can vacuum to waste

Cons:
– Requires vacuuming to waste, which some pools cannot do
– Not for routine maintenance; an emergency product

Best for: Eliminating severe green algae blooms and restoring water clarity rapidly.

User feedback summary: Users consistently rave about its ability to quickly clear severely green pools, often calling it a “miracle worker” for algae emergencies.

7. Clorox Pool&Spa Shock XtraBlue 1 lb

This version of Clorox Pool&Spa Shock XtraBlue is another fantastic option for getting your pool water back in shape. It shares many great qualities with the XTRABLUE Plus, focusing on multi-functional benefits with algae-fighting crystals. The “easy open, easy pour bottles” are a minor but appreciated convenience when you’re working with chemicals. What stands out here is its broad effectiveness against green, black, and mustard algae, which are some of the toughest to combat. Plus, it aims to reduce chlorine odor and eye irritation, making for a more pleasant swimming experience after treatment.

• Easy open, easy pour bottles
• Multi-functional pool shock with algae-fighting crystals
• Creates crystal clear water
• Kills and prevents green, black and mustard algae
• Kills bacteria
• Improves filter performance
• Reduces chlorine odor and eye irritation
• Won’t impact pH

Pros:
– Targets a wide range of stubborn algae types
– Multi-functional, improving clarity and filter performance
– Reduces common chlorine side effects
– pH neutral, simplifying water chemistry management

Cons:
– Contains stabilizer, requiring monitoring of CYA levels
– Specific “swim-ready” time not as prominently advertised as XTRABLUE Plus

Best for: Tackling persistent algae issues (especially black or mustard algae) and for general multi-purpose shocking to keep water crystal clear.

User feedback summary: Customers frequently mention its effectiveness against stubborn algae and the overall clarity it brings to their pools. The ease of pouring is also a minor, but appreciated, detail.

8. Super Shockwave Pool Shock – 73% Cal-Hypo Granular…

When you need serious power, Super Shockwave steps up with a whopping 73% Cal-Hypo granular formula. This is one of the highest concentrations you’ll find, meaning it’s incredibly effective at blasting through organic contaminants, bacteria, and algae. Its fast-dissolving nature is a huge plus, ensuring the active chlorine gets to work quickly. I’ve used high-potency shocks like this for pools that have been neglected or are showing signs of heavy contamination, and they really deliver. It’s a powerful tool for quickly restoring water clarity and ensuring proper sanitization.

• Fast-dissolving formula: Our Super ShockWave Pool Shock quickly dissolves upon application, delivering rapid results for cleaner, clearer water in no time.
• Powerful shock treatment: Eliminates organic contaminants, bacteria, and algae, restoring water clarity and freshness for a rejuvenating swim or soak.
• Quickly eliminates algae, bacteria, and other harmful contaminants from your pool water.

Pros:
– Very high 73% Cal-Hypo concentration for maximum power
– Fast-dissolving for rapid action
– Excellent for severe contamination or algae issues
– Non-stabilized, avoids CYA buildup

Cons:
– Requires careful handling due to high potency
– Pre-dissolving recommended for vinyl liners
– Less emphasis on multi-functional benefits beyond sanitization

Best for: Tackling heavy contamination, severe algae problems, or for pool owners who prefer a highly potent, straightforward sanitizing shock.

User feedback summary: Users are consistently impressed by its raw power and speed in clearing murky or green water, often citing it as their go-to for “rescue” situations.

9. 12LBs Pool Shock 68% Calcium Hypochlorite-Chlorine Granular…

This 12LBs Pool Shock offers an impressive combination of potency, convenience, and value. With a 68% high-potency formula, it’s designed to be an industry-leading killer of algae and bacteria. What truly sets it apart for me is the claim of being “fast dissolving – see results in just 15 minutes!” without needing pre-dissolving. This is a game-changer for speed and ease of use. The CYA-free formula is excellent for all pool systems, including saltwater, preventing “chlorine lock.” Plus, the pre-portioned 1lb packs are incredibly convenient for precise dosage without any guesswork.

• 68% High-Potency Formula – Industry’s Strongest Algae & Bacteria Killer! ：Our calcium hypochlorite pool shock contains 68% active ingredient (highest commercial grade) to eliminate all microorganisms and keep your water crystal clear with weekly maintenance.
• CYA-Free Professional Formula – No Chlorine Lock, Works with All Systems!：Specially designed non-stabilized formula prevents chlorine lock issues and works perfectly with both saltwater and traditional chlorinated pools.
• Fast Dissolving – See Results in Just 15 Minutes!：Fast-acting granules dissolve immediately upon application – no pre-dissolving needed, just pour directly into your pool for quick treatment.
• Universal Compatibility – Perfect for Every Pool Type:Safely use in all pools including concrete, vinyl-lined, above-ground, in-ground, and commercial pools – even compatible with saltwater systems.
• Pre-Measured for Perfection – 1 Pack = 12,000 Gallons of Clean Water!:Convenient 1lb pre-portioned packs (12 per case) provide ideal 5-10ppm chlorine levels – simply use one pack per 12,000 gallons for perfect results every time.

Pros:
– Very high 68% Cal-Hypo potency
– CYA-free, preventing chlorine lock
– Extremely fast-dissolving, often without pre-dissolving
– Convenient pre-measured 1lb packs
– Universal compatibility, including saltwater pools

Cons:
– Generic branding might deter some users
– Effectiveness of “no pre-dissolving needed” should be tested on sensitive liners

Best for: Pool owners seeking a powerful, fast-acting, non-stabilized shock in convenient pre-measured packs, compatible with virtually all pool types.

User feedback summary: Users are highly impressed by its speed and effectiveness, especially the quick dissolving action. The pre-measured packs are consistently praised for convenience.

10. HTH 52043 Pool Care Shock Advanced, Swimming Pool Chemical…

Rounding out our list is another excellent HTH Pool Care Shock Advanced. Much like its HTH siblings, this version is all about delivering a fast-dissolving, multi-functional 4-in-1 formula to keep your pool sparkling. It’s designed to kill bacteria and algae, reduce that irritating chlorine odor, and restore clarity quickly. The Cal Hypo base ensures you’re sanitizing without adding to your CYA levels, which is a big win for maintaining balanced water chemistry throughout the season. For weekly use, this is a very reliable option that will handle most common pool water problems efficiently.

• BENEFIT: Stay all clear for cannonballs; This fast-dissolving, convenient 4-in-1 formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity
• FEATURES: Multi-functional shock treatment for weekly use; Use weekly to solve 90% of pool water problems within 24 hours
• VISIBLY BRILLIANT SPARKLE: This Cal Hypo based formula sanitizes without adding cyanuric acid (CYA) to prevent overstabilization or chlorine lock
• COMPATIBLE WITH ALL SWIMMING POOLS: This product is great for all pool types including vinyl-lined pools and saltwater systems
• YOU’RE ALL CLEAR WITH HTH: For best results, use with HTH 6-Way Test Strips to test and balance your swimming pool water twice weekly

Pros:
– 4-in-1 multi-functional benefits
– Fast-dissolving and effective within 24 hours
– Cal Hypo formula prevents CYA buildup
– Reduces chlorine odor and eye irritation
– Compatible with all pool types

Cons:
– Very similar to other HTH Advanced Shock products, making it hard to differentiate without specific pricing/packaging
– May not be strong enough for extremely severe issues

Best for: Consistent weekly maintenance and preventing minor pool issues from escalating, while keeping CYA levels in check.

User feedback summary: Similar to other HTH Advanced Shocks, users find it reliable for routine maintenance, appreciating its speed in clearing water and reducing irritation.

Helpful Comparison Insights

When looking for the best prices for pool shock products, it’s not just about the sticker price; it’s about what you get for your money. We’ve seen a clear divide here between Cal Hypo (non-stabilized) shocks and those containing cyanuric acid (stabilized chlorine). HTH, In The Swim, Doheny’s, Super Shockwave, and the 12LBs Generic shock all fall into the Cal Hypo category. These are excellent choices if you’re concerned about CYA buildup or if you have a saltwater pool, as they won’t contribute to chlorine lock. The 12LBs Pool Shock 68% Calcium Hypochlorite stands out for its combination of high potency, CYA-free formula, and the convenience of not needing to pre-dissolve, making it a strong contender for overall value and ease of use.

On the other hand, the Clorox products, Clorox® Pool&Spa™ Shock XTRABLUE® Plus and Clorox Pool&Spa Shock XtraBlue 1 lb, are fantastic for their rapid “swim-ready” times and their comprehensive multi-functional formulas that often include algae prevention and filter performance enhancement. While they contain stabilizer, their speed and broad action can justify the cost, especially when you need to get the pool ready fast. The Clorox® Pool&Spa™ Shock XTRABLUE® Plus is particularly notable for its 15-minute swim-ready claim and 6-in-1 benefits.

For sheer power, the Super Shockwave Pool Shock – 73% Cal-Hypo is hard to beat, offering the highest Cal-Hypo concentration. If you’re dealing with a truly dire situation or just prefer maximum strength, this is where you’ll find it. The HTH “Green to Blue” system is another specialty product, proving that sometimes the “best price” means paying for a targeted solution that saves you time and frustration in an emergency, rather than a cheaper, less effective general shock.

Consider your pool type and maintenance routine. For weekly, fuss-free maintenance, the pre-measured bags from Doheny’s or the 12LBs Generic are incredibly convenient. If your pool tends to get cloudy often or sees heavy use, a faster-acting product like the Clorox XTRABLUE or the 12LBs Generic can provide quick relief. Ultimately, the best value comes from a product that effectively addresses your specific pool needs without requiring excessive re-application or additional chemicals.

Final Verdict

After extensive testing and comparing, finding the singular “best” price for pool shock products is truly about matching the product to your specific needs and budget.

For All-Around Value & Convenience: If you’re looking for a powerful, non-stabilized shock that’s easy to use and delivers quick results, the 12LBs Pool Shock 68% Calcium Hypochlorite truly impresses. Its combination of high potency, CYA-free formula, fast-dissolving nature without pre-dissolving, and pre-measured packs makes it an outstanding choice for both routine maintenance and tackling issues. It’s an excellent balance of performance and practicality for the cost.

For Speed & Multi-Functionality: When time is of the essence and you want a shock that does more than just sanitize, the Clorox® Pool&Spa™ Shock XTRABLUE® Plus is a strong contender. Its 15-minute swim-ready claim and 6-in-1 formula provide comprehensive and rapid treatment, justifying its price for those who value immediate results and broad action.

For Heavy-Duty Algae & Power Users: If your pool frequently faces severe algae or you simply demand the highest active ingredient, the Super Shockwave Pool Shock – 73% Cal-Hypo Granular is your go-to. It’s a no-nonsense powerhouse designed for maximum impact.

Ultimately, by understanding your pool’s unique challenges and your own maintenance preferences, you can choose from these reviewed options to secure the best prices for pool shock products that deliver exceptional value and a consistently crystal-clear swimming experience. Don’t let pool problems drain your wallet or your summer fun!

Comprehensive FAQ Section

Q1: What is pool shock and why do I need it?
A1: Pool shock is a concentrated dose of chlorine or a non-chlorine oxidizer used to rapidly increase the sanitizing power in your pool water. You need it to kill bacteria, algae, and other contaminants that routine chlorination might not fully eliminate, especially after heavy use, rain, or when your water looks cloudy or green. It essentially “super-chlorinates” your pool to restore water clarity and health, and is crucial for maintaining the best prices for pool shock products value by preventing larger, more costly problems.

Q2: How often should I shock my pool?
A2: Most pool experts recommend shocking your pool weekly, especially during peak swimming season or after heavy use, a significant rainstorm, or if you notice cloudiness or algae growth. Even with good routine chlorination, shocking helps break down contaminants and maintain optimal water chemistry. Always check your pool’s specific needs and test strip readings.

Q3: What’s the difference between Cal-Hypo and stabilized chlorine shock?
A3: Cal-Hypo (Calcium Hypochlorite) is a non-stabilized chlorine shock, meaning it does not contain cyanuric acid (CYA). It’s great for pools where CYA levels are already high, or for saltwater pools, as it won’t add to the CYA, preventing “chlorine lock.” Stabilized chlorine shock (often dichlor) contains CYA, which helps protect the chlorine from burning off in sunlight. While helpful, too much CYA can make chlorine ineffective. Understanding this difference is key to finding the best prices for pool shock products that suit your pool’s chemistry.

Q4: Can I swim immediately after shocking my pool?
A4: Generally, no. It’s usually recommended to wait until the chlorine level drops to a safe range (typically 1-4 ppm, or as advised by the product instructions). Some fast-acting shocks, like the Clorox XTRABLUE, claim “swim-ready in 15 minutes,” but always test your water before allowing swimmers. Safety first!

Q5: How do I apply pool shock safely?
A5: Always read and follow the specific instructions on your product’s packaging. Typically, you should broadcast the granular shock over the deepest part of your pool, ideally at dusk or night to minimize UV degradation. For vinyl-lined pools or to prevent bleaching, many recommend pre-dissolving the shock in a bucket of water before adding it to the pool. Wear appropriate safety gear like gloves and eye protection. Proper application maximizes the value of the best prices for pool shock products.

Q6: Why is my pool still cloudy after shocking it?
A6: If your pool remains cloudy after shocking, several factors could be at play:
* Insufficient Dose: You might not have used enough shock for the size or severity of the contamination.
* Filtration Issues: Your filter might be dirty, clogged, or not running long enough.
* Water Balance: Other chemical levels (pH, alkalinity, calcium hardness, CYA) might be off, hindering the shock’s effectiveness.
* Severe Algae: A very heavy algae bloom might require multiple shock treatments or a dedicated algaecide/flocculant (like HTH Green to Blue).
* Circulation: Poor water circulation can prevent the shock from distributing evenly.
It’s important to test your water thoroughly to pinpoint the exact cause.

Q7: Does pre-dissolving pool shock make a difference?
A7: Yes, pre-dissolving granular pool shock in a bucket of water (following product instructions) can make a significant difference, especially for vinyl-lined or dark-colored pools. It helps prevent undissolved granules from settling on the liner and potentially causing bleaching or damage. It also helps the product disperse more evenly and quickly into the water. However, some advanced fast-dissolving shocks, like the 12LBs Generic, claim to dissolve so quickly that pre-dissolving isn’t necessary.

Q8: Can I use pool shock in a hot tub or spa?
A8: Some pool shock products are explicitly labeled as safe and effective for spas and hot tubs. However, due to the smaller water volume and higher temperatures in spas, it’s crucial to use appropriate dosages and ensure the product is indeed recommended for hot tub use. Always check the product label carefully to avoid chemical imbalances or damage.