Last two fish, my ocy clowns, been in my 10g with cupramine at 0.4 ppm for a week and half, happy and eating like pigs. Couple days ago they both stopped eating. They seemed to seem more lethargic., one more so. Did a 50% water change and started pulling the copper (not detectable anymore). One of the clowns was dead this morning. Noticed from his gills to his belly only on his bottom lost color. Last guy standing is being pulled today to my other 10g and adding a teaspoon of prazi. Don't know what else to do. Been monitoring ammonia the whole time and no spikes. Keep copper level consistent. 2.5 gallon water changes every two days.
I'm out of ideas.