A2O Water - Made in USA, pH test liquid (BLU/150-200 tests)

very good

This product test the liquids accurately!

Much cheaper to operate versus a PH meter, which needs calibration solution, sensor cleaning solution, regular sensor replacement, batteries, etc. This liquid tester is accurate and colors are vibrant and easy to differentiate. This solution will remain accurate for years, just store it in a cool dry place and make sure to never get the dropper contaminated with your testing solution when using. Also when comparing colors, make sure you do it under a "cool white" light bulb or flashlight for most accurate results.

Our tap is dark blue👍

Worked perfect for a science fair project. The pH scale colors for these drops are a little different than a full pH scale though so if you need exact measurements this might not be for you.

to test my water

These drops works very well and is very accurate for testing waters. I have no complaints at all, I highly recommend this

We used this for my son's science fair project. It worked great! Easy to use!