I check to make sure the 3 balas are still alive... they are relatively new and I still think the ornate could eat/kill them if he really really wanted too.
Blue discus. Had to switch to filtered tap water from RO for a while and the whole tank went to hell in a few days. Everyone still alive fully recovered but her. She's touch and go but holding in there. I'm back on RO and getting a back up unit.
green cory in my bichir tank, been in there for three years seems happy and fat, but i can't catch the little bugger! apparently the bichirs can't either...
Reason: the tank is in the living room (can't help but pass by it) and Mr. Bumpy has a habit of wedging his fat self under the intake tube and getting stuck.
Down in the fish room I always check in the CA tank first to see if anyone is being beat up and how bad the damage is (usally the male convict and female firemouth are fighting, nothing more than some damaged fin though.)