Best Shock Treatments for Pools – 10 Options Reviewed

Let me tell you, keeping my pool sparkling clean isn’t always a walk in the park! I’ve battled algae blooms, cloudy water, and that lingering chlorine smell – we’ve all been there. That’s why I decided to dive deep (pun intended!) into the world of pool shock treatments. This article is a culmination of my research and experiences, offering a detailed comparison of ten popular options to help you choose the best shock treatment for your pool. We’ll cover everything from fast-acting formulas to those tackling stubborn algae, considering different budgets and pool types.

IMAGE	PRODUCT NAME	AMAZON LINK
	HTH 52035 Swimming Pool Care Shock Advanced, Swimming Pool…	View on Amazon
	In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer…	View on Amazon
	Clorox® Pool&Spa™ Shock XTRABLUE® Plus, Kills Bacteria &…	View on Amazon
	HTH 52038 Swimming Pool Care Green to Blue, Advanced…	View on Amazon
	Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock…	View on Amazon
	HTH 52043 Pool Care Shock Advanced, Swimming Pool Chemical…	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
	Pool Shock by Aqua Org Plus – 65% Granular Cal…	View on Amazon
	Super Shockwave Pool Shock – 73% Cal-Hypo Granular…	View on Amazon

1. HTH 52035 Swimming Pool Care Shock Advanced

This 4-in-1 shock treatment promises to kill bacteria and algae, reduce odor, and restore clarity. It’s fast-dissolving and claims to solve 90% of pool water problems within 24 hours. The Cal Hypo base is a plus, as it avoids adding cyanuric acid (CYA).

• Multi-functional
• Fast-dissolving
• Doesn’t add CYA
• Compatible with all pool types

Pros:
– Effective at clarifying water
– Convenient 4-in-1 formula
– Works quickly

Cons:
– Can be pricey compared to some options
– Some users report needing more than the recommended dosage

User Feedback Summary: Mostly positive reviews, with many praising its effectiveness and convenience. A few users noted needing to adjust dosage based on their pool size and conditions.

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

A straightforward, high-chlorine-content (65% available chlorine) granular shock. It’s effective for routine maintenance but requires pre-dissolving to prevent liner bleaching.

• Fast-acting
• High chlorine content
• Suitable for various pool types

Pros:
– Powerful sanitization
– Affordable
– Widely available

Cons:
– Requires pre-dissolving
– Can be harsh on pool liners if not properly diluted

User Feedback Summary: Users generally find it effective and cost-effective for regular maintenance. The pre-dissolving step is sometimes seen as a minor inconvenience.

3. Clorox® Pool&Spa™ Shock XTRABLUE® Plus

A 6-in-1 formula boasting algae prevention and fast-dissolving capabilities (swim-ready in 15 minutes!). It’s compatible with all pool surfaces and integrates with the Clorox Pool app for personalized dosage recommendations.

• 6-in-1 formula
• Fast-dissolving (15 minutes)
• Compatible with all pool surfaces
• App integration for dosage advice

Pros:
– Convenient and quick
– Comprehensive formula
– App support is a helpful feature

Cons:
– Can be more expensive than other options
– Some users found the app slightly cumbersome

User Feedback Summary: Positive feedback on speed and effectiveness, although some users expressed concerns about the price point.

4. HTH 52038 Swimming Pool Care Green to Blue

A two-step system specifically designed to tackle severe algae blooms. It transforms green water to blue within 24 hours, using a powerful algae-fighting shock and flocculant.

• Two-step system
• Effective against severe algae
• Doesn’t add CYA

Pros:
– Excellent for green pool rescue
– Relatively easy to use
– Works effectively against stubborn algae

Cons:
– More expensive than single-step options
– Requires a vacuum to waste system

User Feedback Summary: High praise for its effectiveness in turning severely green pools back to blue. However, it’s essential to have a vacuum-to-waste system.

5. Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock

A straightforward calcium hypochlorite shock. Simple, effective, and focuses on boosting chlorine levels.

• 68% Calcium Hypochlorite
• Simple application

Pros:
– Affordable
– Effective for boosting chlorine levels

Cons:
– Lacks additional features found in multi-functional shocks
– Requires careful pH and alkalinity management

User Feedback Summary: Positive reviews focus on its effectiveness and affordability. Users need to ensure their pool chemistry is balanced before and after use.

6. HTH 52043 Pool Care Shock Advanced

Similar to the HTH 52035, this 4-in-1 shock treatment offers multi-functional benefits including bacterial and algae control and clarity restoration.

• Multi-functional
• Fast-dissolving
• Doesn’t add CYA
• Compatible with all pool types

Pros:
– Effective at clarifying water
– Convenient 4-in-1 formula
– Works quickly

Cons:
– Can be pricey compared to some options
– Some users report needing more than the recommended dosage

User Feedback Summary: Similar to the HTH 52035, this product receives positive feedback for its effectiveness and convenience.

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

Pre-measured 1lb bags for convenient application. A strong Cal Hypo shock (68% calcium hypochlorite and 65% available chlorine) for powerful pool maintenance.

• Pre-measured bags
• High chlorine content
• Effective for algae blooms

Pros:
– Easy to use
– Powerful shock treatment
– Convenient packaging

Cons:
– Price per pound might be slightly higher than bulk options

User Feedback Summary: Users appreciate the convenience of the pre-measured bags. Its effectiveness is frequently highlighted.

8. HTH 52031 Swimming Pool Care Shock

Another HTH option, offering a simpler, multi-use shock treatment focusing on sanitization, clarification, and algae/bacteria prevention.

• Multi-use
• Fast-acting and fast-dissolving
• Doesn’t add CYA
• Compatible with all pool types

Pros:
– Effective for general pool maintenance
– Fast-acting
– Reasonably priced

Cons:
– Lacks some of the extra features of other HTH options

User Feedback Summary: Users find it a reliable and effective option for routine maintenance at a good price point.

9. Pool Shock by Aqua Org Plus – 65% Granular Cal

A 50-pound bucket of calcium hypochlorite granular shock, suitable for both in-ground and above-ground pools, spas, and hot tubs.

• Large quantity (50lb bucket)
• Cost-effective for large pools
• Effective for regular maintenance

Pros:
– Excellent value for larger pools
– Powerful sanitizing action
– Non-stabilized formula

Cons:
– Large quantity might be unsuitable for smaller pools
– Requires careful handling and storage

User Feedback Summary: This is generally well-regarded for its cost-effectiveness for larger pools requiring significant amounts of shock treatment.

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

A fast-dissolving, high-potency shock treatment designed to quickly eliminate algae, bacteria, and contaminants.

• Fast-dissolving
• High potency (73% Cal-Hypo)
• Effective against various contaminants

Pros:
– Rapid results
– Powerful cleaning action
– Works quickly to restore clarity

Cons:
– Higher price point than some other options

User Feedback Summary: High praise for its speed and effectiveness in restoring pool clarity. Some might find the price a little higher, but it’s a strong performer.

Practical Buying Advice:

The best pool shock for you depends on your needs and budget. Consider:

• Pool Size: Larger pools will require more shock, making bulk options more cost-effective.
• Pool Type: Ensure compatibility with your pool’s liner or surface material.
• Algae Problems: For severe algae blooms, a specialized product like the HTH Green to Blue is recommended.
• Frequency of Use: For regular maintenance, a less expensive granular shock may suffice.
• Convenience: Pre-measured bags or fast-dissolving formulas can save time and effort.

Final Verdict:

There’s no single “best” pool shock. HTH products offer various options for different needs, while In The Swim and Clorox provide solid alternatives. For tackling severe algae, the HTH Green to Blue stands out. Choosing the right product depends heavily on your individual pool requirements and budget.

FAQ:

1. How often should I shock my pool? Weekly shocking is generally recommended, but more frequent shocking might be needed after heavy use, storms, or algae outbreaks.

2. What is CYA (Cyanuric Acid)? CYA stabilizes chlorine, preventing it from breaking down too quickly in sunlight. However, excessive CYA can lead to chlorine lock.

3. What are the signs of an imbalanced pool? Cloudy water, algae growth, strong chlorine smell, and irritated eyes are all signs of an imbalanced pool.

4. How do I test my pool water? Use a reliable test kit (strips or liquid) to measure chlorine, pH, and alkalinity levels.

5. What should I do if my pool turns green? Use a product specifically designed for algae removal, like the HTH Green to Blue, and follow the instructions carefully.

6. Can I use pool shock in a spa or hot tub? Yes, many pool shocks are suitable for spas and hot tubs, but always check the product label for specific instructions.

7. What safety precautions should I take when using pool shock? Always wear gloves and eye protection. Keep children and pets away from the area during application and until the shock has fully dissolved. Store pool shock in a cool, dry, and secure location.