1 - Collect water samples 2 - Drag materials into the funnel and then click on them to design your filtration system 3 - Click on the water sample to test your design 4 - Drag the sample over the design and click on it to pour your sample through the filter 5 - Drag your filtered sample so that the sensor's tip is submerged in fluid 6 - Click the sensor to switch between the nitrate sensor and the pH sensor 7 - Click your filtered sample to collect data with the active sensor or to get your results
