There's a number of static cling films in all sorts of colors and opacities available on Amazon. I haven't made a seam in the lighter colored ones yet, but with the black stuff it hides pretty well. Either way, I have some light blue on my 4' discus tank and there was plenty left over, I think it would have done a 6 footer. But they come in different widths and lengths.
I don't know what and ADA foggy screen is, but that's what I thought of...
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