Review on Digital Water Testing Kit - Ruolan Lab pH Meter, TDS and PPM Tester for Hydroponics and Water Analysis by Dion Madison
It's easy to use when it works!
Worked great for two months, then suddenly normal tap water shows 3.2 (usually 6.7 at my house). I spent a couple of hours recalibrating this following their instructions and the gauge jumps all over the place when placed in 6.8 water but it doesn't read above 3. some! There is a 90 day exchange guarantee, I am within that period but have not been able to return it. Find another Ph check method, this method is inaccurate and will only cost you money!
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