How To Shock A Hot Tub Lazy Spa. Only use spa shock for spas and hot tubs. You never want to use bleach in place or regular chlorine or bromine sanitizing, but you can use bleach to occasionally shock your hot tub water and use diluted bleach to clean the shell of an empty hot tub.
Oxidizers work best in a low ph environment, and the efficacy of your spa shock is twice as great at. Use the shock dose recommendations table to see how much chlorine you need to add. We have narrowed down these chemicals into 4 types so they can be easily understood.
Then, use the drain adapter to attach a hosepipe to the hot tub to allow for the drainage of the majority of the water.
Ideally wait until the spa is above 20 degrees celsius so the chemicals will dissolve quicker. But shocking it once again should start to normalize the water color. And more to do with ensuring your hot tub water is clean, safe and comfortable for relaxing in. Oxidizers work best in a low ph environment, and the efficacy of your spa shock is twice as great at.