You should shock your pool based primarily on how often you use it and environmental conditions:

• If you swim nearly every day, shock your pool weekly.
• If you swim less frequently, about once a week or every other week is sufficient.
• During hot, rainy weather or heatwaves, shock your pool weekly to prevent algae growth.
• Shock your pool after heavy rainfall, a pool party or heavy use, or if you notice cloudy water, a strong chlorine smell, or eye and skin irritation.
• Also shock when opening or closing your pool for the season.

In general, weekly shocking is recommended for frequent swimmers and during challenging weather, while bi-weekly shocking may suffice in temperate months or with infrequent use

. Some pool owners only shock as needed based on water chemistry or visible issues, but regular shocking helps maintain clear and sanitized water

. Additional tips:

• Shock in the evening to prevent chlorine degradation by sunlight.
• Follow product instructions for dosage and wait times before swimming.
• Maintain proper pH (7.2-7.4) for best shock effectiveness.
• Always add shock to water, not water to shock, and distribute it evenly around the pool

In summary, a typical schedule is once a week for frequent use or hot weather, every other week for moderate use, and as needed after events or weather changes.