DryTec Calcium Hypochlorite Pool Shock — 12-Pack 1‑lb Bags, 68% Active Chlorine for Fast Clarifying

DryTec 1-1901-12 Calcium Hypochlorite Pool Shock is a concentrated granular pool shock sold as twelve 1‑pound bags, each designed to quickly raise free chlorine and refresh swimming pool water.

Keep your pool water clear and properly oxidized with a high‑strength calcium hypochlorite formula (68% active). These single‑use bags are intended to be broadcast across the pool and dispersed with the filter pump running; they deliver a predictable 5–10 ppm available chlorine per bag per 10,000 gallons when used as directed. Follow water balance and safety guidance for best performance.

How should I apply DryTec pool shock safely and effectively?

Add the product in the evening while the filter pump runs, broadcasting evenly across the deepest area of the pool. Allow at least 30 minutes for initial dispersion, then test chlorine residual with a reliable kit before permitting swimmers to re-enter.

• Use one 1‑pound bag per 10,000 gallons for a 5–10 ppm chlorine boost.
• Broadcast evenly over a wide area in the deepest part of the pool.
• If granules settle, brush the pool floor to disperse them.
• Wait until free chlorine reads 1–4 ppm before swimming.

When and how often should I shock or superchlorinate my pool?

Routine shock is recommended weekly or as needed to prevent issues like algae or cloudy water. Additional treatments may be required after heavy bather loads, storms, or visible contaminants; always verify with a test kit before and after treatment.

• Routine schedule: shock every 7 days or as necessary.
• Extra shocks after wind, rain, or heavy use.
• Repeat treatments until pool tests in the desired chlorine range.
• Always retest free available chlorine following treatment.

What water chemistry should I maintain for optimal results?

Balanced water ensures swimmer comfort and helps the shock perform as intended. Use a test kit that measures pH, total alkalinity, and calcium hardness, and adjust with appropriate pool care products before shocking.

• Maintain pH between 7.2 and 7.6.
• Keep total alkalinity between 60 and 120 ppm.
• Maintain calcium hardness above 200 ppm.
• Test and adjust levels prior to applying shock for best clarity.

What results can I expect after using DryTec calcium hypochlorite?

This shock provides a rapid increase in available chlorine to oxidize contaminants and control algae when used correctly. Clearance time and the number of doses needed will vary with pool size, contamination level, and existing water chemistry.

• Provides 5–10 ppm available chlorine per bag per 10,000 gallons.
• Effective for routine maintenance and problem correction.
• Works best when water balance is within recommended ranges.

Who is this for: Pool owners and maintenance professionals who need a reliable, high‑strength granular shock in single‑use 1‑pound bags for predictable superchlorination. Ideal for above‑ground and in‑ground pools where straightforward dosing, easy storage, and periodic shock treatment are part of regular care. Follow label directions and local regulations when handling and disposing of pool chemicals.