Test the water first
Adjust pH to 7.2–7.6
Calculate the pool volume
Choose the correct shock product
Wear gloves and eye protection
Read and follow the product label
Dissolve granular shock in a bucket if required
Pour shock around the pool perimeter with the pump running
Keep the pump and filter running for 8–24 hours
Brush the pool walls and floor
Avoid swimming until chlorine levels return to safe range
Retest the water before using the pool