Yesterday I did a water change in my Neon/Barb tank which I've been treating for ich, so I'm vacuuming the gravel every time. I always unplug all the electric devices for safety reasons, including the light, so sometimes it's difficult to see exactly what I'm doing. I've never had a problem with my neons getting too brave when I'm messing around in the tank, but after the water change I couldn't find my sixth neon. I'm pretty sure that he got too close to the siphon and was sucked up in it... and flushed with the old water.

I feel like such a horrible person... I can't believe I didn't notice him in the bucket.
From now on, all my neons are coming out of the tank before water changes. Completely unacceptable that I let something like this happen...