Hanna Phosphates tester

[Terry DeMott]

How can you tell if this bad every time I take a reading it is 2.50 did go to 1.53 when I did a water change for one day then back up to 2.50. Any Ideas thx.

 

[garbled]

Try a different kit. The numbers probably won't match exactly, but if they are also always the same with the other kit, then it's probably working properly.

 

[IslandLifeReef]

You can purchase calibration fluid to make sure your checker is working properly. The fluid is calibrated to a known test result, i.e. 100 ppb, so if your checker reads within the test error ranges, your checker is fine.

 

[User]

What does it read with freshly made salt water. That should be phosphate free, but expect a very small number. Like 0.02 or something.

Is this the UHR version that reads in Ppb?