Omni Crystal Clear Multi-Shock (1 lb) Omni 1# Bag Crystal Clear Multi-Shock Omni Crystal Clear Multi Shock is intended to keep your pool water sparkling clear Specially formulated; a blend of multiple oxidizers, clarifiers, and water enhancing buffers. In addition to delivering superb water clarity, it destroys eye irritating chloramines and unpleasant odors, improving swimmer comfort Dissolves quickly and completely to allow swimming as fast as 15 minutes after application Designed for use with all types of pool surfaces. Crystal Clear Multi Shock also contains special clarifiers and filter aids that outperform regular shocks and keep pool water clear and inviting.