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How to Lower Your Hot Tub Alkalinity
How to Lower Your Hot Tub Alkalinity
Written by Kimberly Giraldo
Updated over a week ago

Too-high alkalinity can also result in green water, for a different reason: It can reduce the effects of the chlorine you use to keep algae under control. And while low alkalinity causes erratic pH, high alkalinity typically causes stubbornly high pH levels that are very difficult to lower. A high-pH environment can result in high calcium levels, making the water cloudy or causing “scale,” a hard, crusty mineral build-up.


What you’ll need

  • Test Strips

  • Jacuzzi® pH / Alkalinity Down

  • Measuring cup with ounces


  • Submerge the test strip six inches below the water line

  • Check your Alkalinity water results

  • The Alkalinity desired range is between 80 and 120 ppm

  • Turn on air blower or filter system

  • To lower your Alkalinity, utilize Jacuzzi pH / Alkalinity Down, one ounce per 400 gallons of water, Do not add more than 1 ounce at a time

  • Allow the water to circulate for 30 minutes

  • Retest and repeat the previous steps if needed

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