So I got 10 neon tetras yesterday. They are all acting beautifully. But this morning I woke up and one was dead. Is it normal for a fish or two to die off in a school newly added to a new tank? Also there is a fish drifting apart from the group. He is discolored and swimming by himself. Is this neon tetra disease or is he adjusting to a new home? The tank is a 30 gallon with 6 albino cories, about 75 degrees with plenty of hiding places. It has been established for a few months and fully cycled. Thanks!