Austin's Liquid Shock 4 pk./1 gal.

Austin’s Pool Tech Shock (liquid chlorine 12.5%) Commercial Grade Liquid Chlorine Pool Shock 12.5% Sodium Hypochlorite Ready To Use - No Mixing Required Excellent for regular pool water maintenance, opening your pool for the season or closing your pool for winterizing 4 - Gallons (512FL Oz.) per Case EPA Registration Number: 1672-20001 Great for use Pressure Washer Cleaning Solution on a variety of surfaces such as vinyl siding, concrete, driveways, etc.