sound advice def worth a tryI had a gem tank earlier this year that could not take the therapeutic copper level (cupramine) and stopped eating and was swimming all bizarre like in circles and top of the water. He was disorientated and I think it was copper poison. I immediately reduce the level to half by replacing half the water and he immediately recover the next day. I took him out after a week in a sterile tank and he survived it quite well. Just my experience....