Stephan Mifsud wrote: > Naomi Mizumoto's shrimps were dying of an unknown cause >> 1) I believe shrimps are more sensitive to copper than All my shrimps died when I added "Mikrogent", a Swedish agricultural grade micro-mix which contains a great deal of copper. All fish seemed to be fine, but not the shrimps. I had a lot more shrimps than I thought btw.