Alright, so I decided what a good idea it was to test for Copper (thanks for the advice everyone), and I used Red Sea's test kit. Now, the difference between 0 ppm and .1 ppm is a few shades of green. After consulting with a few other people as to what I color I got, we're pretty unsure. One says 0, one says .1, and I guess I'd maybe shoot for .05. I know that inverts can't live with Cu and I was really looking forward to a herd of hermits and shrimp. My questions are----Can certain inverts live with small levels of Cu? Will this affect live rock and kill everything in it to make it basically base rock? And finally-is there any way to neutralize it? I did the test three times and will do so many more tonight. Thanks for the help. I'll be so pissed if I can't have my herd of hermits...