The species composition and diversity of the epipelic algae of Balik Lake were investigated between May and October 2008. A total of 39 taxa were determined, and Cyclotella meneghiniana, Craticula cuspidata, Closterium strigosum, Cocconeis placentula var. euglypta, and Amphora ovalis were the most conspicuous algae, regarding frequency of occurrence and relative abundance in the epipelic algal flora. While the highest total cell number of the epipelic community was 26,214 cells/cm(2) in October, the lowest was 23,644 cells/cm(2) in July. The highest species diversity index (H') value was 2.26, in June.