Maybe insulted was the wrong word. Let me start over by thanking Richard for his help. I would love to have a full library of SW aquarium books, but I don't. Several other people mentioned they did not know what this was either, so I don't see the problem with posting the question.
The comment...
I am sick of being insulted on this board. It started last night with Joe's Reefer.
If we can't ask questions, why are we here?
I have been laid off since November and I am not going to go out and buy a book to find out what some obviously harmless little pink thing is!
I could have done a...
But momma says copper is the DEVIL!!!!!!
I have read on this board that even undetectable trace amounts of copper is bad for inverts, like whenever someone want to convert from freshwater to a reef, they are warned about residual copper from previous medications.