Well, so much for all the learning. She died tonight. Gave me no warning, no funny behavior, no death curl, ate her shrimp like she usually does 10 minutes before I left for my grandparents' 50th anniversary party. Came back 6 hours later, and she's dead. Just laying on the bottom like she's asleep, but no gill movement. I checked the water this morning like usual and then again after I found her dead, parameters are fine. Was planning on doing a water change tonight and starting her internal parasite medication. Ugh. 