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How to Shock a Pool

Published in Pool Maintenance 3 mins read

Shocking your pool involves significantly raising the chlorine level to eliminate algae, bacteria, and other contaminants. This isn't about electricity; it's about super chlorination.

Why Shock Your Pool?

Shocking your pool is crucial for maintaining water quality and preventing issues like algae blooms. Regular shocking (e.g., weekly) helps prevent algae growth, neutralizes harmful microorganisms, and breaks down organic contaminants. You may also need to shock your pool to address a specific problem, such as a green pool. From Swim University: "[This fast-acting, quick-dissolving swimming pool shock kills bacteria, controls algae, and destroys organic contaminants in pools.]"

Steps to Shock Your Pool

  1. Pre-Dissolve the Shock: Don't just throw the shock directly into the pool. Pre-dissolving in a bucket of water minimizes damage to your pool's surfaces and ensures even distribution. As shown in the Swim University video, "[you want to pre-dissolve each bag in a bucket of water…then put in the shock mix it up with a stick.]"

  2. Calculate the Amount of Shock: Use a pool shock calculator (easily found online) based on your pool's size and the type of shock you're using. Always follow the instructions on your specific shock product's packaging.

  3. Add the Shock: Once dissolved, slowly pour the shock solution into the pool, ensuring it's evenly distributed. Ideally, add the shock while the filter is running.

  4. Run the Filter: Keep your pool's filtration system running for at least 24 hours after shocking to circulate the chlorine and complete the cleaning process.

  5. Test the Water: After 24 hours, test your water to ensure the chlorine levels are within the recommended range. If not, adjust accordingly. Follow your specific product's guidance and pool maintenance resources.

Types of Pool Shock

There are various types of pool shock, including chlorine-based and non-chlorine options. Choose the appropriate type based on your pool's needs and preferences. Remember, even if you use liquid chlorine regularly, shocking with a granular or other form of shock is still essential to effectively address contaminants.

When to Shock Your Pool

Regular weekly shocking is recommended for preventative maintenance. However, you should also shock your pool:

  • After a heavy swim load.
  • When the water appears cloudy or discolored.
  • If you notice algae growth.
  • After a storm.

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