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![pH/Alk Up pH & Alkalinity Increaser by FreshWater](http://estore.mainelytubs.com/cdn/shop/files/FreshwaterPHAlkalinityUp_1_grande.jpg?v=1721832027)
Adjust your hot tub's PH & your Alkalinity Up with this. You'll want to adjust PH first, never adding more than 1 ounce at at time. Give PH about 24 hours/one day to settle in before adding anymore PH. Then you can adjust your Alkalinity, hardness, and sanitizer.