I found one of my T. Natans semi-crispy behind the aquarium stand at 11 PM last night. I did a water change on Sunday evening and I guess I filled the tank higher than usual... and was away until the wee hours of Tuesday AM... checked in Tuesday evening noticed only Guenter was out swimming... usually weird 'cuz they are (were?) pretty social. I got a sneaking suspicion... and it was confirmed. I'm sad.