HTH™ Pool Care Shock
Pool Chlorine Shock
HTH™ Pool Care Shock
Pool Chlorine Shock
HTH™ Pool Care Shock is a fast-acting pool shock engineered to restore sparkle and confidence—without adding cyanuric acid (CYA).
- This Cal hypo swimming pool shock treatment boosts chlorine quickly to kill bacteria, fight algae, and clear cloudy water, helping you maintain balanced, inviting conditions after storms, parties, or heavy use.
- Designed for all pool types, this dependable pool shock treatment dissolves fast and won’t fade vinyl liners, so you can focus on the swim, not the stress.
Prepare for whatever lands in your water—HTH™ is here to help.
Product Benefits
How to Use
How to Use
Why You Should Use This Product: HTH Pool Care Shock is an effective calcium hypochlorite (cal‑hypo) shock designed for weekly pool treatment. It helps kill bacteria and algae, clears cloudy water, and restores visible water clarity without adding cyanuric acid (CYA), which can contribute to chlorine lock.
Before Use: Test pool water and adjust total alkalinity and pH before application. Always add chemicals separately and keep the pump running.
Application Instructions
Use the entire contents of the bag once opened. Do not use this product in a floater or feeder.
Add this product during evening hours while the pump is running. Broadcast evenly over a wide area of the pool, preferably in the deepest part.
If any granules settle on the pool floor, brush to disperse until fully dissolved. Undissolved granules may bleach or damage pool surfaces.
Do not enter the pool until free available chlorine levels return to 1–4 ppm.
Weekly Shock Treatment
For routine pool maintenance or to address dull or cloudy water, shock the pool once per week.
Add 1 bag of this product per 12,500 gallons of pool water.
Algae Control
For visible algae, apply the recommended shock dosage as close to algae growth as possible. Brush algae areas immediately after treatment and repeat shock treatment if algae persists.
How to Use
Why You Should Use This Product: HTH Pool Care Shock is an effective calcium hypochlorite (cal‑hypo) shock designed for weekly pool treatment. It helps kill bacteria and algae, clears cloudy water, and restores visible water clarity without adding cyanuric acid (CYA), which can contribute to chlorine lock.
Before Use: Test pool water and adjust total alkalinity and pH before application. Always add chemicals separately and keep the pump running.
Application Instructions
Use the entire contents of the bag once opened. Do not use this product in a floater or feeder.
Add this product during evening hours while the pump is running. Broadcast evenly over a wide area of the pool, preferably in the deepest part.
If any granules settle on the pool floor, brush to disperse until fully dissolved. Undissolved granules may bleach or damage pool surfaces.
Do not enter the pool until free available chlorine levels return to 1–4 ppm.
Weekly Shock Treatment
For routine pool maintenance or to address dull or cloudy water, shock the pool once per week.
Add 1 bag of this product per 12,500 gallons of pool water.
Algae Control
For visible algae, apply the recommended shock dosage as close to algae growth as possible. Brush algae areas immediately after treatment and repeat shock treatment if algae persists.
How to Use
Why You Should Use This Product: HTH Pool Care Shock is an effective calcium hypochlorite (cal‑hypo) shock designed for weekly pool treatment. It helps kill bacteria and algae, clears cloudy water, and restores visible water clarity without adding cyanuric acid (CYA), which can contribute to chlorine lock.
Before Use: Test pool water and adjust total alkalinity and pH before application. Always add chemicals separately and keep the pump running.
Application Instructions
Use the entire contents of the bag once opened. Do not use this product in a floater or feeder.
Add this product during evening hours while the pump is running. Broadcast evenly over a wide area of the pool, preferably in the deepest part.
If any granules settle on the pool floor, brush to disperse until fully dissolved. Undissolved granules may bleach or damage pool surfaces.
Do not enter the pool until free available chlorine levels return to 1–4 ppm.
Weekly Shock Treatment
For routine pool maintenance or to address dull or cloudy water, shock the pool once per week.
Add 1 bag of this product per 12,500 gallons of pool water.
Algae Control
For visible algae, apply the recommended shock dosage as close to algae growth as possible. Brush algae areas immediately after treatment and repeat shock treatment if algae persists.
How to Use
Why You Should Use This Product: HTH Pool Care Shock is an effective calcium hypochlorite (cal‑hypo) shock designed for weekly pool treatment. It helps kill bacteria and algae, clears cloudy water, and restores visible water clarity without adding cyanuric acid (CYA), which can contribute to chlorine lock.
Before Use: Test pool water and adjust total alkalinity and pH before application. Always add chemicals separately and keep the pump running.
Application Instructions
Use the entire contents of the bag once opened. Do not use this product in a floater or feeder.
Add this product during evening hours while the pump is running. Broadcast evenly over a wide area of the pool, preferably in the deepest part.
If any granules settle on the pool floor, brush to disperse until fully dissolved. Undissolved granules may bleach or damage pool surfaces.
Do not enter the pool until free available chlorine levels return to 1–4 ppm.
Weekly Shock Treatment
For routine pool maintenance or to address dull or cloudy water, shock the pool once per week.
Add 1 bag of this product per 12,500 gallons of pool water.
Algae Control
For visible algae, apply the recommended shock dosage as close to algae growth as possible. Brush algae areas immediately after treatment and repeat shock treatment if algae persists.
How to Use
Why You Should Use This Product: HTH Pool Care Shock is an effective calcium hypochlorite (cal‑hypo) shock designed for weekly pool treatment. It helps kill bacteria and algae, clears cloudy water, and restores visible water clarity without adding cyanuric acid (CYA), which can contribute to chlorine lock.
Before Use: Test pool water and adjust total alkalinity and pH before application. Always add chemicals separately and keep the pump running.
Application Instructions
Use the entire contents of the bag once opened. Do not use this product in a floater or feeder.
Add this product during evening hours while the pump is running. Broadcast evenly over a wide area of the pool, preferably in the deepest part.
If any granules settle on the pool floor, brush to disperse until fully dissolved. Undissolved granules may bleach or damage pool surfaces.
Do not enter the pool until free available chlorine levels return to 1–4 ppm.
Weekly Shock Treatment
For routine pool maintenance or to address dull or cloudy water, shock the pool once per week.
Add 1 bag of this product per 12,500 gallons of pool water.
Algae Control
For visible algae, apply the recommended shock dosage as close to algae growth as possible. Brush algae areas immediately after treatment and repeat shock treatment if algae persists.
Ingredients
Ingredients
Active Ingredient:
Calcium Hypochlorite: 52%
Other Ingredients: 48%
Total: 100%
Ingredients
Active Ingredient:
Calcium Hypochlorite: 52%
Other Ingredients: 48%
Total: 100%
Ingredients
Active Ingredient:
Calcium Hypochlorite: 52%
Other Ingredients: 48%
Total: 100%
Ingredients
Active Ingredient:
Calcium Hypochlorite: 52%
Other Ingredients: 48%
Total: 100%
Ingredients
Active Ingredient:
Calcium Hypochlorite: 52%
Other Ingredients: 48%
Total: 100%
Safety, Storage, and Disposal
Safety, Storage & Label Guidance
Use this product only as directed. Avoid contact with eyes and skin, and avoid breathing dust.
Wear protective eyewear and wash hands thoroughly after handling.
Do not mix this product with other chemicals.
Store in a cool, dry, well‑ventilated area away from heat or open flame.
For complete safety precautions, first aid instructions, and disposal information, always refer to the product label.
Safety, Storage & Label Guidance
Use this product only as directed. Avoid contact with eyes and skin, and avoid breathing dust.
Wear protective eyewear and wash hands thoroughly after handling.
Do not mix this product with other chemicals.
Store in a cool, dry, well‑ventilated area away from heat or open flame.
For complete safety precautions, first aid instructions, and disposal information, always refer to the product label.
Safety, Storage & Label Guidance
Use this product only as directed. Avoid contact with eyes and skin, and avoid breathing dust.
Wear protective eyewear and wash hands thoroughly after handling.
Do not mix this product with other chemicals.
Store in a cool, dry, well‑ventilated area away from heat or open flame.
For complete safety precautions, first aid instructions, and disposal information, always refer to the product label.
Safety, Storage & Label Guidance
Use this product only as directed. Avoid contact with eyes and skin, and avoid breathing dust.
Wear protective eyewear and wash hands thoroughly after handling.
Do not mix this product with other chemicals.
Store in a cool, dry, well‑ventilated area away from heat or open flame.
For complete safety precautions, first aid instructions, and disposal information, always refer to the product label.
Safety, Storage & Label Guidance
Use this product only as directed. Avoid contact with eyes and skin, and avoid breathing dust.
Wear protective eyewear and wash hands thoroughly after handling.
Do not mix this product with other chemicals.
Store in a cool, dry, well‑ventilated area away from heat or open flame.
For complete safety precautions, first aid instructions, and disposal information, always refer to the product label.
Frequently Asked Questions
-
What is pool shock and what does it do?
-
How often should I shock my pool?
-
How do I shock my pool?
-
How much shock do I add to my pool?
-
Will pool shock kill algae?
-
Is pool shock the same as chlorine?
-
Can pool shock go bad or expire?
-
What is HTH™ Pool Care Shock made of?
-
How quickly does HTH™ Pool Care Shock work?
-
Can HTH™ Pool Care Shock be used in a hot tub?
Reviews
Related Products
Discover products our customers trust and recommend
Block Chlorine Lock with Cal Hypo
Discover how Cal Hypo pool chlorine works without CYA to prevent chlorine lock and keep pool water clear, balanced, and safe for swimmers.
Simplified Pool and Spa Care with HTH™ Test to Swim
Simplify pool and spa water testing with the HTH™ Test to Swim™ App. Scan your test strip, get instant results, and receive personalized pool care recommendations.
Transform Your Pool with Brilliance™
Looking for clearer pool water? Discover how HTH™ Brilliance Cal Hypo Chlorine Tablets improve water clarity and prevent chlorine lock.
Quick Pool Tips
Always read product label directions prior to using and use only as directed
Always add chemicals to pool water, never the other way around
Never add chemicals to pool water when people are in the pool
Never mix products together
Always store pool products in a cool, dry location and out of direct sunlight
