Well, I've got some bad news guys. Last night I came home and checked on the tank. Shrimpy was belly up under a rock. Then this morning the two snails were gone too.
I was afraid to check on Patrick. I fished out the bodies, and then I poked Patrick to see if he was still alive. Thank goodness he is still alive, for now. He keeps climbing up the tank wall and then plopping himself upside down on the sand, then flipping himself over.
I feel so terrible! That's six lives that I've ended since Sunday. All testing is coming back within normal range! I don't know what else to do.