Isn't all this "banding" simply a product of how our own monitor is interpreting the signals sent to it? - Or how that signal may have been corrupted on its way to the monitor?
I would say the answer depends. If someone has a high speed LCD (like most laptops), then they are actually running at 18-bit color (R,G,B are each 6-bit) instead of full 24-bit color.
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The easiest way to test is for someone who gets a
smooth background to post a screen snapshot of the Aquarium . If someone who is experiencing "lines" or banding sees a smooth image, it confirms that their monitor IS capable of displaying a smooth background, it's an issue with the Aquarium. If they see the "smooth" background as having banding, then their monitor is the problem.