Pool Shock
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Shock Dosage
| Type | Dosage |
|---|---|
| Chlor Brite |
Routine Treatment: 3 oz. treats 10,000 gallons. Superchlorination: 11 oz. treats 10,000 gallons. Algae Control: 21 oz. treats 10,000 gallons. |
| Power Powder Plus |
Superchlorination: 9-18 oz. treats 10,000 gallons. |
| Fresh 'N Clear |
Initial Treatment: 2 lb. treats 10,000 gallons. Weekly Treatment: 1 lb. treats 10,000 gallons. |
Comparison Chart
| ☀ | Chlor Brite | Power Powder | Fresh 'N Clear |
|---|---|---|---|
| Removes Organics | ⚫ | ⚫ | ⚫ |
| Swim After 15 Minutes | ⚪ | ⚪ | ⚫ |
| Includes CYA | ⚫ | ⚪ | ⚪ |
| Near-Neutral pH | ⚫ | ⚪ | ⚫ |
| Adds To Hardness | ⚪ | ⚫ | ⚪ |
| Contains Clarifier | ⚪ | ⚪ | ⚫ |
| Bromine Compatible | ⚫ | ⚫ | ⚫ |
| Ideal Pool Type | Salt & Liquid Chlorine Pools | Tablet Chlorine Pools | All Pools & Spas |
When to shock
Chloramines: Combined Available Chlorine (CAC), or Chloramines, are formed when your Free Available Chlorine (FAC) becomes tied up with contaminants such as sweat, fertilizer, dirt, rain, bodily fluids, and pollution. Some of these contaminants contain ammonia and organic or inorganic nitrogen compounds. CAC is a weak sanitizer (40-60 times less effective than FAC) and causes a chlorine-ammonia odor. It also irritates the nose, eyes and skin of swimmers. Weekly shocking will prevent and remove chloramines, which restores more FAC effectiveness to your pool.
Opening & Closing: When opening your pool, it's recommended that you shock your pool after balancing the other chemicals. This will oxidize the particles, kill bacteria, and clarify the water. When it's time to close your pool, shocking will help fight off contaminants over the long winter months.
Rain & Thunderstorms: During storms, your pool is likely to be contaminated by rain water, dust, and other debris. Shocking after severe weather will help clean up after Mother Nature.
Algae Outbreaks: When algae appears in your pool, superchlorination with powerful types of shock like Power Powder Pro or other variations of Cal-Hypo can often eliminate the problem.
Heavy Pool Usage: When pools are used by a large number of people in a short amount of time, the water can become contaminated in a variety of ways. Shocking after pool parties or other unexpected contaminations is highly recommmended.
Pool Shock FAQ
Which Type Of Shock Should I Use?
Each of our three types of shock excel in different types of pools. Chlor Brite is perfect for saltwater pool and pools with vinyl liners or other sensitive surfaces because of it's nearly-neutral pH level. It also dissolves quickly and won't cloud water. Power Powder is our most powerful form of shock, and as a result, it's perfect for eliminating algae blooms and other major contaminants. It does, however, have a high pH, which could damage more sensitive pool surfaces like vinyl. Fresh 'N' Clear is a chlorine-free shock that oxidizes non-living organic contaminants, increasing the effectiveness of the Free Available Chlorine (FAC) in your pool water. That said, because it doesn't contain any chlorine, it's not useful for treating algae or killing germs by itself.
How Long Does Pool Shock Last?
The shelf life of pool shock can vary depending upon how and where it's stored. If stored in a cool, dry, and dark location, your shock will remain usable for years to come. If stored in the heat, however, it will quickly solidify and become useless. For longer and safer storage, purchase your shock in buckets, then store them in cooler places.
Why Did Shock Make My Water Cloudy?
Because it takes longer to dissolve than other pool shocks, Power Powder can temporarily cloud your water depending upon the type of Power Powder used and preexisting water conditions. This is normal, and the cloudiness should disappear after the shock dissolves.
Shocking Tips
- Balance your pH to 7.2 - 7.4 prior to shocking.
- Don't mix pool shock with any other pool chemical.
- Never pour shock directly into your skimmer.
- Shock your pool at night to reduce UV degradation.
- Run your pool filter for at least 8 hours after shocking.
- Shock again if chlorine levels remain at 0 after 8 hours.
AccuBlue In-Store Water Testing
Leslie's in-store water testing offers precise water testing and customized treatment plans. Stop by your local Leslie’s pool store for a FREE AccuBlue Water Test and stay ahead of pool water balance issues, keeping your pool clean, safe, and beautiful. Find your closest Leslie’s Pool Store today and stop by for your free pool water test!
Three Types of Pool Shock: What's the Difference?
Ready to dive into crystal-clear water? Whether you’re a first-time owner or a seasoned pro, understanding the unique roles of dichlor, cal-hypo, and chlorine-free pool shock is essential for a safe and sparkling swim. From clearing stubborn algae and neutralizing chloramines to refreshing your water after heavy rain or a busy weekend of swimming, choosing the right treatment ensures your water remains perfectly balanced. Explore our guide to compare shock types and find the high-quality solution you need to make a big splash in your backyard oasis!
Learn the difference between the three main types of pool shock: Three Types of Pool Shock: What's the Difference?
3 Steps to a Healthy Pool: Sanitize, Shock, Prevent
Maintaining a pristine and inviting backyard oasis is the key to a summer full of fun and relaxation! While routine maintenance like testing and filtration is vital, the secret to a healthy swim lies in our simple, high-quality 3-step program: Sanitize, Shock, and Prevent. Dive into our expert guide to learn how daily sanitization, weekly shocking, and proactive algae prevention work together to keep your water crystal clear and germ-free. Let’s make a big splash together and ensure your water stays safe and sparkling all season long!
Check out the 3 easy steps to a clean pool: 3 Steps to a Healthy Pool: Sanitize, Shock, Prevent.
Dichlor Shock vs. Cal-Hypo Shock
Choosing the right shock is the secret to a crystal-clear swim! Whether you’re considering sodium dichlor or calcium hypochlorite (cal-hypo), understanding the "when" and "why" of each treatment is essential for top-tier water quality. Dive into our expert comparison of dichlor vs. cal-hypo shock to find the perfect high-quality solution for your maintenance routine.
Let’s get your water sparkling so you can make a big splash all season long Dichlor Shock vs. Cal-Hypo Shock.
AccuBlue Home Digital Pool Water Testing
Leslie’s AccuBlue Home is the total solution for a healthy swimming pool. It all starts with the testing device, which employs Leslie’s state-of-the-art water testing technology to give you comprehensive water chemistry results and recommendations in 60 seconds — all from the comfort of your own home. It's the only at-home pool water test that precisely measures 10 aspects of water chemistry. Learn more: Leslie's AccuBlue Home.
What's the Best Type of Pool Shock to Use? — Video
Pool owners and professionals should understand the three main types of pool shock: dichlor, cal-hypo, and chlorine-free, as each serves a different purpose in maintaining a clean, safe, and well-sanitized pool.
Shocking is necessary when:
- Chlorine levels are low
- Chloramine levels are high
- Algae is present
- There's been an accident in the water
- There has been heavy pool use
- There has been a major weather event, such as heavy rain or high winds
Best Selling Pool Shock Bundles:
- Cal Hypo Pool Shock 12-Pack — Leslie's Power Powder Plus Pool Shock 12-Pack of 1lb Bags
- Granular Chlorine Pool Shock 12-Pack — Leslie's Chlor Brite Pool Shock 12-Pack of 1lb Bags
- Non-Chlorine Pool Shock 12-Pack — Leslie's Fresh 'N Clear Pool Shock 12-Pack of 1lb Bags
The video below will compare the different types of shock and the issues they address to help you determine which one is right for your pool and when it's best to use it.