HTH Swimming Pool Care Green to Blue Advanced Shock System (6 pack) + HTH 52036 Swimming Pool Care Shock Advanced

• The HTH Green to Blue Advanced Shock System helps fight severe algae blooms, transforms green water to blue within 24 hours, and includes a flocculant to drop particles to the pool floor for easy vacuuming. It is compatible with all pool types. The HTH Shock Advanced formula kills bacteria and algae, reduces chlorine odor and irritation, and quickly restores crystal clarity within 24 hours. It is a fast-dissolving and convenient 4-in-1 weekly shock treatment. Both products provide chlorination without adding extra cyanuric acid (CYA) to prevent overstabilization or chlorine lock. For best results, use the products as part of a weekly pool care routine and test water chemistry twice weekly with HTH test strips. The HTH Shock Advanced formula is compatible with all pool types including vinyl liners, won't fade liners, and can be used with saltwater systems.