Long term Dissolved oxygen monitoring will take place on Clear Lake for the Citizen Lake Monitoring Program. The project includes the following goals: 1) More efficient and less time consuming for volunteer; 2) Allow for accurate testing of DO at more frequent intervals to develop a more comprehensive profile; 3) Increase accuracy of testing; 4) Allow for rapid testing of multiple sites following herbicide treatments of EWM; 5) Develop a benchmark of Clear Lake water quality.