Hi all, I would like to ask whether why my bristle worm died? I just bought the LR yesterday, last time when I just started my another tank, it also happen, many of the worms died on the sand, is it that this kind of scene will happen to new tank? Why does this happen? Will all the living things in the LR die? My amminia is not at peak now, my NO2 is 0.8mg/l.