How To Shock A Hot Tub With Chlorine Granules. When using wait 2 hours before applying testing strips (this gives the water time to react to the shock) to give the correct reading. Shocking your spa water allows you to raise chlorine levels above the recommended amount for a brief period of time.
Be sure to test the water one last time before stepping into it the first time. Set aside time in the evening to shock your pool (as mentioned before, the sun can break down up to 5ppm of chlorine per day. The most common hot tub sanitizers are chlorine or bromine.
Maintains clean, clear, sanitized water
Shocking involves using a concentrated dose of chemicals to increase the available free chlorine or bromine in your hot tub. You can easily shock dose your hot tub once you know the hot tubs litrage. Both available in various forms: Be sure to test the water one last time before stepping into it the first time.