SeaKlear Chlorine Free Spa Shock is a Potassium Peroxymonosulfate based product that is proven to keep spa water clear and odor free. This product is an oxygen-based oxidizer that reacts with organic waste. It breaks down organic waste that can lead to the formation of chloramines. Chloramines cause cloudy water and odors. Chlorine Free Shock is a great alternative to shocking with chlorine, which can affect pH levels.