HASA Algi-Ban 2lbs Black Algae Treatment Algaecide | 64122

Where algae is located on pool walls: Place 1 oz. (1/8 cup) HASA ALGI-BAN in a cotton cloth. Tie with string and suspend the bag into the water so that it touches the black algae spot. Allow the HASA ALGI-BAN bag to remain in place for 45-60 minutes, then remove and brush algae away. In extreme cases it may be necessary to repeat treatment or allow longer contact time. For spot treatment on walls and bottom use the prescribed dosage regardless of pool volume in gallons. Where pool is infested with black algae: Adjust pH and brush as explained above. Add at least one pound of HASA ALGI-BAN per 4,000 gallons of pool water and broadcast it over entire pool surface all at one time. Shut down pump for 24 hours. Follow this treatment with a thorough brushing. If a few traces of black algae remain, the above process should be repeated, or the treatment for spot black algae should be followed. In severe cases, where the pool has been neglected for long periods of time, consult your pool service expert for advice.

WARNING! This product is a strong oxidizing and bleaching agent and should not be used on vinyl, stained, painted, or colored pools.