I moved a few months back and in the process of the move I upgraded to a new tank . After the move a few fish just didn't survive it however my nearly 2 year old 6 line did. Since the move I have attempted to add about 6 different fish at different times but usually after a day or 2 they come up missing or dead . All of the original fish that made the move are alive and doing well . All water tests are normal. I have not seen any obvious signs of aggression from the 6 line when I am around but could it be possible he is killing them off one by one as I try adding them?? Thanks in advance




