BioGuard Arctic Blue Shock - 2 lb. Type_Gas Valve Tests all of the following:

Tests all of the following:

portable for any occasion

Drain filter

Sanitizer (chlorine or bromine) handles the living threats: bacteria

BioGuard Arctic Blue Shock - 2 lb. Type_Gas Valve Tests all of the following:BioGuard Arctic Blue Shock 2 lb. Overview BioGuard Arctic Blue Shock is the perfect first step in winterizing your pool, killing off bacteria, algae, and other contaminants that can wreak havoc on your pool during the long winter months. Its powerful granular formula can be quickly broadcast into your pool without needing dilution, saving you from handling messy liquids. When used in conjunction with an effective algaecide, your pool will stay clean