Originally posted by Kerrowdown but it's your vision of what you saw.
I come in here late but I offer my version nevertheless.
Krrodown is on the right track suggesting a colour correction. He also says:
"but it's your vision of what you saw" as if to offer an apology for his colour correction. (because he is a polite man) This is O.K. but in my view this is an unnecessary precaution to avoid bad blood. The poster asks for help and when help is given to correct an obvious fault, as in this case bad white balance, it should be truthfully stated. After all manufacturers of cameras go to great length to get white balance right and when the operator or the camera get it wrong there should be no apology needed to corrected it.
There are however situations where a colour cast is deliberately added to an image but I reckon I can pretty well judge whether a cast was deliberate or an accident. (Not always but most of the time.)
And finally (after a mild rant) here is my version.
I have stated many times, I am not a great lover of slow exposure of fast running water. It is just so fashionable in photography now that anybody just blindly follows this trend. A waterfall is a wild display of the enormous power of water tumbling down a slope or cliff and should not be soothing to the eye. The right exposure is important, shutter speed should not be too fast to freeze every drop or splash but slow enough to capture the dynamism of the falling water. This is my opinion.
Cheers