In The Swim Pool Shock – 68% Cal-Hypo Granular Sanitizer for Crystal Clear Water – Defends Against Bacteria, Algae, and Microorganisms – 50 Pounds
$36.41
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Price: $36.41
(as of Jun 16, 2025 13:09:13 UTC – Details)
From the brand
In The Swim was founded in 1982 by a husband and wife team. Shipping chlorine from the back of their garage and taking orders on their front porch, they began to have a vision that this could be something big.
40 years later, In The Swim remains one of the country’s largest online retailers for pool chemicals, supplies and equipment. Thanks for shopping with us!
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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
Customers say
Customers find the pool shock works well for in-ground pools and appreciate its value, with one noting it costs about 40% less than alternatives. The product effectively clears water within hours and maintains chlorine levels longer, while being easy to use compared to liquid chlorine. Customers disagree on the product’s quality, with some reporting only 40% of the granules dissolve properly.
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