How can i take a picture of a blue ocean with a red sky-need lens filter?

I have seen pictures of vivid aqua oceans and the sky above is tinted red. I know this is not natural but the result of some filter. What kind of filter would I need to achieve this look?
Asked Jan 19, 2010
I have never heard of this type of filter but it would be completely possible to create this over photoshop.
Answered Jan 22, 2010

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