Drytec Calcium Hypochlorite Pool Shock 1 lb Bags - 24 Pack

In this review the Drytec 1-1901-24 Calcium Hypochlorite Chlorine Shock Treatment is evaluated for pool owners who need a concentrated, cost effective shock option. The bottom line: this product is best for routine shock treatment and emergency algae control because each one-pound bag treats up to 10,000 gallons and delivers a strong 68% calcium hypochlorite formula that provides roughly 5 to 10 ppm available chlorine per treatment. The packaging and directions are straightforward, and the product works well when water balance is managed correctly.

Key Features

• High concentration: The 68% calcium hypochlorite delivers a powerful chlorine boost so a single bag raises available chlorine by about 5 to 10 ppm in 10,000 gallons of water.
• Simple dosing: One bag per 10,000 gallons makes it easy to calculate shock doses without complex conversions.
• Even application: Directions recommend broadcasting in the deepest part of the pool while the filter pump runs to ensure quick dispersion and contact with contaminants.
• Water balance guidance: The label reminds users to maintain pH at 7.2 to 7.6 and total alkalinity at 60 to 120 for best performance and swimmer comfort.
• Usage practice: Use the entire contents when opened and brush any granules that settle to avoid localized deposits on pool surfaces.

Who It's For

This product suits backyard pool owners, condo maintenance teams, and anyone who prefers buying shock in premeasured one-pound bags for simple, predictable dosing. It is particularly helpful for those who perform weekly shock treatments or need a fast-acting product to treat visible algae or cloudy conditions.

Those with low tolerance for handling granulated chemicals or pools that require non-calcium formulations should look elsewhere, since this is a calcium hypochlorite product and instructions warn to maintain calcium hardness above 200 ppm and to follow water balance guidance closely.

Pros & Cons

Pros

• Cost effective: customers report strong value for money and good shock performance compared with similar powders.
• Effective shock level: delivers a reliable chlorine boost to address algae and contaminants when used as directed.
• Easy dosing: one bag per 10,000 gallons simplifies treatment calculations and reduces dosing errors.

Cons

• Possible cloudiness: some users report mixed results on water clarity, with occasional cloudy water after use.
• Contains calcium: adds calcium to the pool, so pools sensitive to calcium buildup should monitor hardness.

Specifications

Product	Calcium Hypochlorite Chlorine Shock
Package	1 lb bag, 24 pack
Active ingredient	68% Calcium Hypochlorite
Dosing	One bag per 10,000 gallons (provides 5 to 10 ppm available chlorine)
Recommended pH	7.2 to 7.6
Total alkalinity range	60 to 120 ppm
Calcium hardness guidance	Maintain above 200 ppm

Our Verdict

The Drytec 1 lb 24-pack is a practical choice for pool owners who want straightforward, potent shock treatment at a low cost per dose. When users follow the label directions, maintain water balance, and brush any settled granules, the product performs well for routine shock and algae control, making it a good value for most residential pools.

Frequently Asked Questions

How much pool does one bag treat?
One 1 lb bag is formulated to treat 10,000 gallons and provides roughly 5 to 10 ppm available chlorine.

When should I add the shock?
Add during evening hours while the filter pump is running and broadcast evenly in the deepest part of the pool for best dispersion.

Is special water balance required?
Yes, maintain pH 7.2 to 7.6, total alkalinity 60 to 120, and calcium hardness above 200 ppm for optimal results.