Blue water?

[redsea]

Hello, I have a bit of a problem. I noticed when making water the other day that it appeared blue. At this point the output was still on the sink, and part of my blue tube was also in the sink. At first I thought the light was reflecting off the blue tube and making the water appear blue, but the water in my bucket seems to have a blue tint! I am not really sure how to fix this. Maybe my eyes are just playing tricks on me? Thanks!