I had horrible luck with firefish on my first tank. Didn’t have a lid at first, he went carpet surfing. Got a diy lid kit and a little while later another firefish (I do love them) and the poor guy managed to find a < 1/2 gap in the back where where cables came out and he jumped. Worst part was he some how managed to land on top of the mesh... poor guy died an inch above the water 
Lost a yellow goby as well he managed to jump into the overflow, down into the sump, then jumped out of the sump. I found him but he didn’t make it very long.
Current tank much better lid, no issues so far but I do worry about water changes etc

Lost a yellow goby as well he managed to jump into the overflow, down into the sump, then jumped out of the sump. I found him but he didn’t make it very long.
Current tank much better lid, no issues so far but I do worry about water changes etc

, they'll be good to go assuming some bird isn't in prime position


