i agree with daddy. its your testing equipment. get a good ph meter and ditch the liquid. ph meters will last a long time if you take care of it. i have a hanna (which i dont like) that does the job and i only had to recalibrate it once in 2 years. the calibration solution is cheap too. probably $3 for both ph4 and ph7 calibration fluid. temperature of water can screw up test strip or liquids because they dont have a temp compensation built into it.
cigarettes42 Reviewed by cigarettes42 on . Dramatic pH drop in filtered H2O? I picked up a fresh Brita water filter yesterday, and have been using it to do some minor water treatment. I noticed something - the pH drops from about 8.5 to a near-perfect ~5.8 just going through the filter. Does anybody else experience this? I typically just use straight tap but I'm willing to roll with a water change, and at least filter it before adding nutes. Looks like if this keeps doing what it does, all I have to do is add nutes after filtering, no pH down required! Rating: 5