Above Ground Pools are BACK IN STOCK!
New year, new pool—get ready for next season with the ultimate backyard upgrade. Shop now!
POOL SHOCK
A convenient way to sanitize and disinfect pool water.
In The Swim has a large collection to choose from!
Pool Shock
Pool shock and super chlorinators for swimming pools help keep your pool free from contaminants. Shock your pool weekly or more often during periods of hot weather or heavy use. In The Swim has a large selection of pool shocks and super chlorinators to choose from.
Pool Shock Treatment
Calcium Hypochlorite
68% Available Chlorine
- USED FOR
- spring opening
- fast chlorine boost
Starting at
$24.99
!
1 lb. per 10k gallons
Super Pool Shock Treatment
Calcium Hypochlorite
73% Available Chlorine
- USED FOR
- spring openings
- stubborn algae blooms
- regular usage
Starting at
$29.99
!
1 lb. per 10k gallons
Di-Zap Multi-Shock
Sodium Dichlor
56% Available Chlorine
- USED FOR
- ideal for pools, spas, fountains and water features
Starting at
$39.99
!
1 lb. per 10k gallons
Chlorine-Free Shock
Potassium Monopersulfate
38% MPS
- USED FOR
- chlorine and bromine pools
Starting at
$24.99
!
1 lb. per 10k gallons
Instant Liquid Chlorine
Calcium Hypochlorite
1.07 lb. equivalent to 1 gallon of liquid chlorine
- USED FOR
- easy and instant!
- spring openings
- weekly maintenance
Starting at
$24.99
!
3-5 oz per 10k gallons
CALCIUM HYPOCHLORITE CHLORINE GRANULES
Highly effective, at an economical price!
Keep your swimming pool or spa sparkling clean and contaminant-free.
$99.99
-
$3,399.99
SHOCK VALUE PACKS
Pool water maintenance made easy!
Includes pool shock, algaecide, clarifier, and FREE test strips.
$49.99
-
$79.99
Cloud-Out Shock
Destroys Cloudy Pool Water Quickly!
Solve the problem of cloudy pool water fast and with minimal effort.
$30.99
Shocking Tips
Why Shock?
- removes visible algae in the pool
- removes invisible bacteria in the pool
- removes chloramines and other disinfection byproducts
- removes cloudy water by oxidizing suspended particles
- removes organic and inorganic contaminants
- maintains healthy, sanitary pool water
When to Shock
It is best to shock at night for a couple of reasons:
- For most shocks, you can’t swim for about 8-10 hours after shocking, so it’s best to do the shocking treatment when you’re done swimming for the day.
- The sun can eat up the shock because it is not stabilized, so it’s best to shock when the sun isn’t out for maximum performance.
How often to Shock
Many people “shock” their pool, or superchlorinate, once per week. This may not be necessary, unless you have high bather loads, algae or chloramine levels greater than 0.3ppm. A DPD test kit will help you calculate chloramine levels in your pool. If all is well, it may be advisable to shock monthly, to ensure that the water remains sanitary.
How to Shock a Pool
- Clean the Pool. Leaves and debris on the floor and surface will waste your chlorine’s killing power, as it attacks these organic materials, rather than the A-B-C problem that we are trying to correct.
- Lower the pH. Chlorine is very sluggish at high pH levels. At a pH of 8.0, less than half of the chlorine you add to the water will convert to hypochlorous acid, the killing form of chlorine. Lower the pH to 7.2 before shocking.
- Read the Label. We have 8 different types of pool shock, all with slightly different dosages. For some pool shock, dilution in a bucket is necessary to dissolve the granules, to prevent damage to pool surfaces.
- Add the Shock. Distribute the granular chlorine throughout the pool surface, with the pool pump running. Be careful not to spill any on your clothing or the pool deck, and don’t broadcast it into the wind!
- Brush the Pool. This helps to distribute the chemical, and removes the layer of dust and film on your pool surfaces, which may allow some contaminants to escape treatment. A good brushing, vacuuming and backwashing should follow an algae shock treatment.
MORE INFO
For more detailed information, including the A-B-Cs of Pool Shock, Pros and Cons, and Pool Shock Safety, read the In The Swim eGuide.