I bought this pH test kit to test the effectiveness of different brands of alkaline drops and it worked great. I also bought a digital pH meter but it was unstable (and a waste of money compared to this test kit). This pH test kit allowed me to test different brands of bottled water before and after using the pH drops to see if they really did what they said they did. This pH test kit worked great and allowed me to determine that all brands of bottled water I usually buy are slightly acidic when planted around 4-5 on the pH scale and after using various brands of alkaline drops (I have Alkazone and pH10Max tested). Water reaches a pH of 8.x to 9. Easy to use and pretty easy to read if you follow the simple instructions!
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