How Much Chlorine to Shock a Green Pool? - Shock Calculator
Calculate exactly how much liquid chlorine you need to shock your green pool. Uses the SLAM method based on your CYA levels to kill algae fast.
What is the SLAM Method?
SLAM stands for **Shock, Level, And Maintain**. To clear a green pool, you must raise the Free Chlorine (FC) to a specific target level (based on your CYA) and **keep it there** until the algae is dead, the water is clear, and you pass an overnight loss test.
Formula: Your Shock Level should be approximately **40% of your CYA level**. For example, if your CYA is 40 ppm, your shock level is 16 ppm.
Frequently Asked Questions
Can I shock with chlorine tablets?
It is not recommended. Tablets dissolve too slowly to effectively 'shock' a pool. Liquid chlorine or calcium hypochlorite powder are the preferred methods for rapid algae removal.
How do I know if the algae is dead?
Dead algae will turn grey or white and settle on the pool floor. You must vacuum this debris out of the pool and clean your filter to complete the process.
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