All-in-One Algae Killer: Clorox Pool&Spa XtraBlue Swimming Pool Algaecide kills algae in just 24 hours. This fast-acting treatment effectively eliminates pool algae, ensuring your pool remains clean and clear. Kills and Prevents All Pool Algae: This product quickly and effectively eliminates green, mustard, and black pool algae, providing comprehensive protection and ensuring a clean and algae-free swimming environment. Non-Staining and Non-Foaming: Our XtraBlue Swimming Pool Algaecide features a preventative, non-foaming formula that fights algae growth before it starts. Salt Pool Compatible: This product treats up to 25,000 gallons and is suitable for all pool types, including salt pools. Its patented, non-staining formula ensures compatibility and effectiveness, allowing you to spend less time maintaining and more time enjoying your swimming pool. Clorox Pool App: Test like an expert anytime, anywhere with the Clorox Pool App. Solve common swimming pool problems and get personalized product and dosage recommendations.