cajun Red line?

[The Meat Fisher]

So I was riding to a friends house from going fishing today, and while I was there, I noticed that I was really low on line! So I asked Robert(This particular friend of mine.) if he had any line I could spool up with. By the time we left I had spooled up with some 20-pound cajun red line.

Now understand the science behind cajun redline, the red color supposedly disappears underwater because the red colored end of the light spectrum can't penetrate the water for more than a few feet. But doesn't That mean that it becomes like regular non-colored line once the red color dissappears?

What is your opinion of cajun redline and does it work any better than non-colored line for you? Have you any proof that it is better than non-coloerd line? Thanx!