Shocking a hot tub spa is the application of an ample dose of chlorine (sodium dichlor) or non-chlorine shock (potassium monopersulfate or MPS). One purpose of this treatment is to break-down organic waste contaminants which cause odor and cloudy water. After treatment, water quality and clarity is often completely restored.
If irritating chloramines are present, shocking also converts them back to active chlorine. If bromine sanitizer is being used, shocking activates the bromide ion (which by itself has no disinfecting capability) which becomes hypobromous acid in water, a good sanitizer. Both of these shocking products are 100% compatible with the alternative sanitizer systems that we offer.
Regardless of which sanitizer system you use, periodic shocking is essential for clear, clean hot tub water. It will also allow your sanitizer to perform at peak efficiency