Changed my water(about50%) and cleaned my canister filter really well. Turned out I cleaned everything too well. Lost all my fish! Couldn't figure out what was happening so recorded my blue tangs deaths. I took it to my lfs, about 3 hrs away, he listened to everything I said and watched my video. He said I had an ammonia spike and now I only change up to 20g at a time and leave my canister alone. That one really hurt!
