Just open dispencer and take test paper roll out. Unwrap an replace in dispencer and feed end thru the hole. Just tear off a piece and dip it in the water you want to test. Then compare the color of the wet end to the chart on the dispencer. That will tell you the PH of your water. #Rankboosterreveiw #SPonsored #Sonkir https://www.amazon.com/Strips-Luxway-Universal-Alkaline-Measuring/dp/B07C976PWN