Well, I'm down to seven. About a half week ago or so at the end of a WC I found the smallest of reds stuck between my piece of pink quartz and a sponge filter. I'd slid them to the front of the tank while I was cleaning the bottom, there was plenty of room for the fish up until the water got shallower than the fish was tall. I took the water level down to the top of the heater. The next day I saw it had taken up residence behind my water pump in the back corner of the tank, darkened and appeared to have a minor abrasion down it's side.
I didn't think the fish needed anything but a little time and the usual clean water, but I was wrong. Over the next couple days the fish continued to stay in it's hidden spot most of the time and never really came out more than a foot. Last night I heard a splash I found the fish at the center of the tank swimming oddly almost straight down and it nearly laid on top of the sponge filter before swimming back to it's corner. I finally saw it's eyes at this point and saw they were cloudy. I quickly set up a quarantine tank, pulled the fish and hit it with QuickCure, but the fish obviously died shortly after I went to bed last night.
I guess on the positive side it was the runt of the litter and it was a red and not a golden. Also the other 7 are eating more than 50% daily what they were in the 55, so I'm hoping for a serious growth spurt.