73% Calcium Hypochlorite Pool Shock - 24 Pack One Pound Bags

In this review we look at a heavy-duty pool oxidizer sold in one pound packets and packaged as a 24 pack; it is aimed at pool owners who need a fast chlorine boost and reliable algae control. The bottom line: this product is for people who want a multi-purpose shock that doubles as a sanitizer, clarifier and algicide, and who prefer measured single-use bags for seasonal openings or regular maintenance. Our review finds it effective at restoring clear water quickly when used as directed, especially when added at night.

Key Features

• High chlorine content: The 73% calcium hypochlorite formula gives a rapid and strong chlorine boost to raise free chlorine levels quickly.
• Multi-purpose action: Works as a sanitizer, clarifier and an algicide so one product can treat cloudy, green, or underchlorinated pools.
• Single-pound packets: One pound bags make dosing straightforward and convenient for routine maintenance and targeted shock treatments.
• Simple dosing guidance: The instructions recommend 1 lb per 10,000 gallons for maintenance and 2 lb per 14,000 gallons to treat algae, which helps avoid guesswork.
• Even dissolving when mixed: The granular powder is intended to be pre-dissolved in a bucket of water, which improves dissolution and reduces grain settling in the pool.

Who It's For

This product suits backyard pool owners and property managers who need a potent, no-frills shock that clears water quickly and acts as an algaecide when needed. The measured 1 lb bags are convenient for users who prefer predictable doses and less handling of bulk chemicals.

It is not ideal for those who need non-chlorine alternatives or who cannot store calcium-based disinfectants safely. Also, customers in Maine should note this variation cannot be sold or shipped to that state.

Pros & Cons

Pros

• Very effective at raising chlorine quickly to combat algae and cloudy water.
• Multi-purpose formulation reduces the need for separate clarifiers or algicides.
• Single-pound packets make dosing and storage easier and reduce waste.

Cons

• Requires careful handling and pre-dissolving; not a ready-to-use liquid option.
• Cannot be shipped to Maine, limiting availability for some buyers.

Specifications

Active ingredient	Calcium hypochlorite (73% chlorine)
Net weight per bag	1 lb
Pack size	24 one pound bags
Primary uses	Sanitizer, clarifier, algicide
Dosing guideline	1 lb per 10,000 gallons (maintenance); 2 lb per 14,000 gallons (algae)
Best application time	Night application; wait 8-10 hours before swimming

Our Verdict

This 24 pack of one pound calcium hypochlorite shock is a practical choice for pool owners who need a dependable and powerful chlorine treatment for quick results. It offers good value for those who want multi-purpose performance and easy dosing in single-use bags, though it requires careful handling and pre-dissolving. For routine shock treatments and season openings it delivers clear water efficiently.

Frequently Asked Questions

How should I add the shock to my pool?
Pre-dissolve the granules in a bucket of water then broadcast the solution around the pool at night; wait 8 to 10 hours before swimming.

How much do I use for algae?
Customers are advised to add 2 bags (2 lb) per 14,000 gallons to treat green pools or during season openings.

Is this product a sanitizer and clarifier?
Yes, the high chlorine formulation is designed to act as a sanitizer, clarifier and algicide when used according to instructions.