Bear Creek 2

I agree with @Brian_Schrayer about shooting at base ISO and using bracket and blend to bring in the water however you want it to look. Even skilled application of noise reduction can’t compensate for what ISO 12,800 does to color and detail. In another post, I discussed in detail how you can do what Brian is talking about.

If you are using super high ISO to get fast shutter speeds because you are hand-holding in low light, that’s a different matter. The technique Brian mentions is best done from a tripod.