Million thanks for your reply: I do monitor dosing the tank. I'm using MB7 and RBF because LFS recommended. They told to help speed up the nitrafying process. I have some fish (1-yellow tang, 1-damsel, 2-tomato clown, 2-tangs, 2 hermits, 3-peppershrimp) I had 3 turbo snails, died after few...