Products tagged with water test

The performance of conductivity probes are affected by use due to residue build up and aging. M10038B is a lab grade 6.44 ppt TDS solution standard prepared against a NIST traceable potassium chloride solution that allows you to recalibrate your conducti

With this test you can easily determine whether the aquarium contains enough CO2. Simply fill the aquarium water into the test tube, give it a quick shake and seconds later the color reaction will reveal the result.