4 Things to Know About Swimming After Adding Algaecide

Wait at least 15 minutes Most algaecides are safe to swim in after 15 minutes once the pump has circulated the chemical.

Check the product label Some algaecides require an hour before swimming, while others are fine immediately. Always follow the specific instructions on the bottle.

Be careful if you also shocked the pool If you added algaecide and shock together, wait until chlorine levels drop below 5 ppm — typically 8 to 24 hours.

Err on the side of caution Your pool will still be there in 20 minutes. Better to wait a little than to itch your whole swim.