What would you expect the "NLS" forum to say?
There are plenty of other prepared fish foods that dont contain copper in any way shape or form. I dont see any reason to knowingly add it to my tank. Dont get me wrong...I fed NLS to all my fresh water fish and think it is a very good food for fresh water or fowlr.
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260g mixed reef, 105g sump, water blaster 7000 return, Bubble King SM 300 skimmer, Aqua Controller Jr, 4 radions, 3 Tunze 6055s,1 tunze 6065, 2 Vortech MP40s, Vortech MP20, Tunze ATO, GHL SA2 doser, 2 TLF reactors (1 carbon, 1 rowa).
http://www.canreef.com/vbulletin/showthread.php?t=50034 . Tank Video here
http://www.vimeo.com/2304609 and here
http://www.vimeo.com/16591694