No, we’re not talking about electricity or startling. We are talking about oxidizing. When we use our hot tubs we leave behind what is known as “bather waste”. This combination of organic content along with ammonia and chloramines or bromamines (more on this later) and lotions, deodorants and cosmetics can make your spa water cloudy and dull. The solution is a weekly application of Robarb Spa Shok. Generally, a 4 ounce per 500 gallon dose is sufficient for treatment. When we”shock” our tubs, the cover should be removed completely and all of jets and bubblers should be running for about an hour. If your spa water looks dull and perhaps has an off odor, it’s time to oxidize.