Don’t give up, I’m newbie too.
Before:
After:
The mask:
Mask strategy:
- Look for the greenishes:
- Look for not so saturated greens:
- Look for not so bright greens:
Correction;
- Select the green channel
- Drag the whit point in the colors square to correct the green channel. I dragged it to fucsia
- Increase saturation slider to make the effect more visible.
I’m not saying that this is IT. But at least it’s a starting point.
A simpler way to change the colors may be tweaking the white balance.
EDIT: i’m thinking of why I couldn’t isolate just the water in the mask. Maybe because what’s “wrong” with the water is something that affects all the image, that is, a greenish hue all over it. Which reinforces what I said above: white balance is probably the way to go.