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No. Other than blue dye or food coloring (including the coloring that is in some pool chemicals), nothing adds a blue color to the water.

So, why does the water in a white pool look blue? The water absorbs the shorter wavelengths of light (the red range) first. The longest wavelengths - the blue range - travel much deeper. (Any Scuba diver knows that everything looks blue in deeper water) In your pool, that blue light is reflected back from the bottom of the deep end, giving the whole pool that distinctive blue color!

With that in mind, anything which enhances water clarity, allowing more light to get through, will enhance the blue color!

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