Shock: Chlorine Shock

Fast-acting chlorine shock treatments that eliminate contaminants, restore water clarity, and boost sanitizer performance. Shop chlorine shock at Pool Supply 4 Less from brands including Super Shockwave, Pool Care and BioLab. Popular picks include Super Shockwave 1 lb 73% Cal-Hypo and Pool Care Cal Hypo Shock 1lb 6 Bags. Part of our Shock range.

  • Save 7% Out of stock
    Pool Care 1lb Shock 99% Dichlor 6 Bags - QPC551516
    Pool Care 1lb Shock 99% Dichlor 6 Bags - QPC551516
    SKU: QPC551516
    $79
    $85
    Out of stock
  • Save 34% Out of stock
    BioGuard Easy Shock & Swim 22825BIO
    BioLab BioGuard Easy Shock & Swim - 22825BIO
    SKU: 22825BIO
    $27
    $41
    Out of stock
  • Save 13% Out of stock
    Pool Care 4lb Shock 99% Dichlor - QPC55154EACH
    Pool Care 4lb Shock 99% Dichlor - QPC55154EACH
    SKU: QPC55154EACH
    $69
    $80
    Out of stock
  • Save 37% Out of stock
    BioGuard BurnOut 73 22860BIO
    BioLab BioGuard BurnOut 73 - 22860BIO
    SKU: 22860BIO
    $17
    $27
    Out of stock
  • Save 34% Out of stock
    BioGuard Smart Shock 22948BIO
    BioLab BioGuard Smart Shock - 22948BIO
    SKU: 22948BIO
    $27
    $41
    Out of stock
  • Save 33% Out of stock
    BioGuard Smart Shock 22947BIO
    BioLab BioGuard Smart Shock - 22947BIO
    SKU: 22947BIO
    $20
    $30
    Out of stock
  • Save 29%
    Suncoast Pool Season Chlorinator Concentrate 12000141 50# - 47251320
    Suncoast Pool Season Chlorinator Concentrate 12000141 50# - 47251320
    SKU: 47251320
    $289
    $409
    In stock
  • Save 46%
    Suncoast Pool Season 2 lb Chlorinating Concentrate Bottle - 47251300
    Suncoast Pool Season 2 lb Chlorinating Concentrate Bottle - 47251300
    SKU: 47251300
    $29
    $54
    In stock
  • Save 14%
    Leisure Time Spa 56 Dichlor Chlorinating Granules, 2 lb Bottle - 22337A
    Leisure Time Spa 56 Dichlor Chlorinating Granules, 2 lb Bottle - 22337A
    SKU: 22337A
    $35
    $41
    In stock
  • Save 37%
    Leisure Time® E5 Chlorinating Concentrate Granules 5 lb
    Applied Biochemists Leisure Time® Chlorinating Concentrate Granules 5 lb - E5
    SKU: E5
    $69
    $110
    In stock
  • Save 26%
    Suncoast Pool Season Chlorinator Concentrate 25#
    Suncoast Pool Season Chlorinator Concentrate 25# - 47251310
    SKU: 47251310
    $165
    $225
    In stock
  • Save 34%
    Jacks Magic After Shock Chlorine Reducer, 1 lb - JMAFTER16
    Jacks Magic After Shock Chlorine Reducer, 1 lb - JMAFTER16
    SKU: JMAFTER16
    $28.92
    $44
    In stock
  • Save 36%
    Life 47246460 1 lb Bromine Booster establishes a quick Bromide reserve in hot tub water. Use before adding Life Brominating Tabs.
    Life 1 lb Bromine Booster - 47246460
    SKU: 47246460
    $18.99
    $29.99
    In stock
  • Save 34%
    Lt Brominating Granular Hazmat 2 Lb | 45436A
    Applied Biochemists Leisure Time 2lb Brominating Granular - 45436A
    SKU: 45436A
    $31
    $47
    In stock
  • Save 33%
    SeaKlear Balanced Shock Oxidizer, 2 lb | 90614SKR
    SeaKlear Balanced Shock Oxidizer, 2 lb - 90614SKR
    SKU: 90614SKR
    $31.70
    $48
    In stock
  • Save 40%
    Suncoast Pool Season 1 lb Chlorinating Concentrate Bag - 47251290
    Suncoast Pool Season 1 lb Chlorinating Concentrate Bag - 47251290
    SKU: 47251290
    $14.99
    $25
    In stock
  • Save 34%
    Leisure Time Spa Reserve Bromine Sanitizer, 32 oz Bottle, 12/Case | LT43
    Applied Biochemists Leisure Time Spa Reserve Bromine Sanitizer, 32 oz Bottle - LT43 - 45300A
    SKU: 45300A
    $31.40
    $48
    In stock
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    King Technology 2OZ Non-Chlorine Shock Frog Maintain - 01-14-6132
    King Technology 2OZ Non-Chlorine Shock Frog Maintain - 01-14-6132
    SKU: 01-14-6132
    $15
    $25
    In stock
  • Save 33%
    SpaPure Multi Shock Extra 2 lb Bottle 12/Case | C005210-CS20B2
    Haviland SpaPure Multi Shock Extra 2 lb Bottle - C005210-CS20B2
    SKU: C005210-CS20B2
    $25.78
    $39
    In stock
  • Save 34%
    Haviland SpaPure Spa Oxidizing Shock 2.2 lb Bottle - C002476-CS20B3
    Haviland SpaPure Spa Oxidizing Shock 2.2 lb Bottle - C002476-CS20B3
    SKU: C002476-CS20B3
    $24.24
    $37
    In stock
  • Save 23%
    EZ Spa Total Care, 1 lb Bottle | EZSTC1
    APi EZ Spa Total Care, 1 lb Bottle - EZSTC1
    SKU: EZSTC1
    $35
    $46
    In stock