Gosh I don't know why I said that. I actually went and did the whole thing up and the vase is full to the last two inches. I have about 2 inches of substrate, 3 moneywort stems and some java moss. There are a couple seasoned pieces of driftwood, but I'm a class-A moron and didn't soak them so they'd stay sunk. Half the water is from my tank, and the other half is treated from the tap, because I am lazy.
Added three shrimp, and if they don't like it, well, there is always 2-for-1 Tuesdays at the LFS. They seem okay right now, just chilling on whatever they can chill on and being way cute.
Sounds like a nice setup. I've kept several RCS in much
worse conditions for months and they all survived. They even began to colonize.