Hello everyone , I'm making this thread to ask a few questions , primarily about my ammonia issues . First of all , I had a serious alkalinity drop from 13.something to 10.1 (I was struggling to keep it low) out of the blue , and it killed my elegance coral . However , that same day my banggai cardinal also died and I havent figured out why yet . All the fish in my aquarium have always died mysteriously or were killed by some freak accident , for example we re-did the cushions on some chairs that were near the aquarium and used scotch guard which killed my clownfish , a cleaner shrimp and a fire goby (very sad day) . Anyways my point is that I dont know why the cardinal fish died but it might be because my ammonia has always stayed around 0.15 - 0.20 and it never drops really . Could some of these fish be dying to prolonged exposure to water with ammonia in it . By the way it never converts to nitrite so either my bacteria crew is very weak or my test kit has gone bad or something.