Pure + Simple PURA-027 2 lbs Scented Pool Shock Lemon Verbena - Say goodbye to heavy chemical odors and step into a world of fragrant, crystal clear water. Pure + Simple Chlorine Free Oxidizing Pool Shock creates water so clear you’ll feel as if you’re swimming in liquid air. It is great for pool openings or closings, parties or special evening swims. It breaks down organic contaminants, oils and other impurities leaving your water clean, clear and inviting. The fast dissolving formula means you can swim just 15 minutes after dosing! The fragrance lasts up to 6 hours and oxidizes contaminants for up to 72 hours.