Frozen water fall

This is my shutter speed photo.  I was gone on vacation and so that is why I have posted two in a row.  I decided to freeze the waterfall at a shutter speed of 1/2500, and I wanted to use an aperature of 5.6 as it was a close up and then the ISO was 1250.  When I increased the ISO it made it lighter but I preferred the darker edge to it.