I got 3 Angelfish from Petsmart. The next day, two died. Water Params were fine... 0 ammonia, 0 nitrite, 5 nitrate. So I get 5 more from the LFS. Each day, one has died. Now I'm down to the 1 from Petsmart and 1 from my LFS. I've came to the conclusion that it has to be the 1 from petsmart...