Had my first actual casualty- I did a water change and hours later found one dead fry in the tank- with edges degraded. At first thought maybe it starved, because I'd accidentally skipped one of the midday feedings. But later saw a very tiny one, so obviously if that one didn't die from missing a feeding this one wouldn't (it was as large as most). I think it may have gotten caught by the hose suction against the mesh side of the box when I siphoned water out.
The tiniest one I saw in the evening- most of the fry then congregate loosely about an inch under the water surface behind the mesh box. I saw one that was less than half size of the others- still just looked like a tadpole with spade tail shape barely visible. I culled that one
Few more blurry pics: