I suspect that the reason no one ever notices is that you only realize the visual difference when you are given a comparison. When I had the chance to examine a tank that was 1/2 starfire and 1/2 normal I thought the difference was substantial. (The glass on that tank was thicker than 1/2")
Another way to put it..... would be to say that it is like looking at the world through green sunglasses. When you first put them on, everything looks green....after a while, you don't notice anymore but the glasses are still filtering out non-green light. Your brain just tries to compensate.
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400 gal reef. Established April, 2007. 3 Sequence Dart, RM12-4 skimmer, 2 x OM4Ways, Yellow Tang, Maroon Clown (pair), Blonde Naso Tang, Vlamingi Tang, Foxface Rabbit, Unicorn Tang, 2 Pakistani Butterflies and a few coral gobies
My Tank: http://www.canreef.com/vbulletin/showthread.php?t=28436
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