Workers from the city of Celina remove a curtain from the pilot test site in Grand Lake near the Celina Rotary lighthouse. The 60-day test was done to determine if silica will help the lake's good, diatom grow and overtake the lake's harmful blue-green algae. Results are expected to be publicly released some time in January, said Ross Youngs, CEO of Algaeventure Systems, Marysville. The company is conducting the study with $25,000 in funds from the Ohio Department of Agriculture.