Aquascreen test-strips for semi-quantitative determination of total hardness, pH, nitrite (NO2-), nitrate (NO3-) and chlorine (Cl2) in your water.
Simply fill up your glass with water, open XEMATest, take a test strip and dip it in. Pay attention that all the colored pads are under the water. After a few seconds you can already take out the strip. Shake off some excessive water drips and place on a clean horizontal surface. And check the result.
Be sure. Be safe