I got a copperband a month ago. He was eating frozen brine at the store so i got him. When i brought him home he ate frozen mysis the first day. Then about 3 weeks went bye and then he reandomly stopped eating so i checked my water and everything was perfect. I started feeding him live brine and he still didnt eat that. Then a week later he died. I really have no idea why was it cause of lack of nutrition or what please help me out. Cause i really want to try one again but i dont want that to happen again.