I finally got her worked up to the 2tsp/1gallon aqua salt/water concentration. She really seemed to be responding well to it. She started swimming all over the place and looked generally better.
This morning, at 5am, I got up for work and saw her lying on the countertop next to her bowl. I thought it was all over!!! She was dried out and not moving at all. But when I went to fill my water bottle she started flopping around! So I plopped her into the bowl, wished her well, and ran out the door to catch my ride.
I hope she makes it.