Green algae is causing problems for fish in Sterling Lake.
City leaders suspect fish in the lake are dying because of an excessive growth of the naturally occurring green algae.
Officials say the algae is absorbing all of the oxygen from the water.
Most of the dead fish have since been removed from the lake. Wildlife officials have met with city leaders to assess the green algae problem. City crews are using pumps to add oxygen from the water to help break up the algae.
City Officials say the water is not dangerous to people. Crews will continue to remove dead fish as they appear.