Dissolved Oxygen (9 minutes total) 

1. Fill the small vial to overflowing with the sample water

2. Add 2 dissolved oxygen test tabs to the vail

3. Screw the cap on the vail and be sure there is NO AIR in the vialn(it should be overflowing with water)

4. Mix by inverting the vial untill the table have disintegrated ( approximately 4 minutes)

5. Once the tablets have dissolved, wait 5 min

6. Compare the color of the sample to the dissolved oxygen chart.

7. Once you have recorded the result on the data sheet, dump the contents in the water container 

8. THOROUGLY RINSE THE VIAL AND CAP WITH DISTILLED WATE