Hi Beth,
Yes, I have checked my calibration. It is correct. I can not post a picture, but I am positive of the diagnosis. I am treating the fish in my display tank. I have no Inverts, just live rock which is now base rock due to the hypo. Can I do copper in the display tank. I am concerned about using any chemicals period. I have also tried formalin baths without success. What do you think? Scott