This image was acquired from
flickr. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Some aggressive water moving going on here. Initially the pond water incubator room temperature was turbid due to silt that quickly settled. But the water then turned brown probably due to bacteria. After about week the water is crystal clear above the silt and ongoing decay bottom and below the still floating and decomposing grass