Just a bubble - what do you think?

Very nice! Of all 4 I prefer the very first one. Makes me feel calm.
How did you obtain these black-blue colors?

It's actually more or less only "auto levels" in Photoshop, followed by some increased saturation and contrast. The blues and whites come from the reflected sky, and I guess the blacks from where there are no reflections. Many of the shots did not have these nice reflections but just a dull greyish or brownish color, so the angle of the water surface seems crucial to get nice colors.

Thanks for the info.

this impressive shot just shows that photography is more about the "art of it "rather than the cameras and stuf you're using (which definitively help in a way)
wrths a frame
I like the first one better
regards
Khalid

First two photos are just beautiful!