HTH Super Green to Blue Granule Shock System 7.2 lb

HTH Green to Blue Pool Shock

4 lb.In 24 hours your pool will once again be blue. Transforms your green water to a clear sparkling sea of blue.
2 treatments for 5000 gallons. 1 treatment for 10000 gallons. 2-part system: 1-2 5lb. Green to Blue and 1 - 2.5lb Green to Blue II.