Update #2: After a total of two 50% water changes and multiple medication adds, I'm down to 4 Rose Line sharks, 5 Rummynose, 3 Cardinal Tetras, 1 Danio, 4 Praecox Ranbowfish and 2 Julii Corys. I've lost a total of 21 fish from when I believe this started AND it has been almost a week since I...