4 Things to Know About Waiting After Adding Algaecide

Wait 15 to 30 minutes with the pump running Most liquid algaecides disperse quickly in circulating water. The main risk is the concentrated dose right where you pour it, not the chemical itself at pool-safe levels.

Check the label for longer wait times Copper-based or quat algaecides may recommend waiting up to 24 hours. These formulas are more aggressive or prone to staining, so follow the label instructions exactly.

An hour is always safe If you are unsure, waiting an hour is fine. No harm comes from waiting too long.

Do not swim in the pour spot immediately The danger is the undiluted concentrate. Give it time to mix fully before anyone enters the water.