This powerful algaecide easily destroys and prevents all common algae growth: green, blue/green, mustard/yellow and black. Works with pools using chlorine or bromine, non-foaming, pH neutral, no adjustment needed after application. Continuously destroys algae for days after application. Safe for swimmers. When using as a stand alone product, pool use can resume shortly after application. Adjust pH of pool water in the range of 7.2 - 7.6. Shocking the pool water before the addition of CB7 may be necessary if algae is stubborn or resistant. Visible algae, 4 oz. per 10,000 gallons of pool water. 12 oz. may be used for stubborn or resistant algae. Continuously filter for 24-hours, avoid shocking or raising pH for 72 hours after application.