General cure and copper are dosed at the same time all the time. I didnt even do that. I took this whole process as slow as anyone possibly could. I guarantee its the cupramine. Anyway it should be all good now, just waiting on him to get his strength back and then I will observe them for another week before I do anything else.Also worth noting: when you go from one medicine to another, you need to wait a few days in between. If you don’t and you medicate back to back, you risk over medicating their system and, essentially, kill them by doing too much. Just because the meds are out of the water does not mean the meds have left fish’s body.