Oh wow. Been a while since I updated this, too. Things have been going great with it. No flowers from the lotus, but I expected that. Next year I'm going to try the tub in a different position.
As a reward for being so patient with me, here are some updated pictures!
Remember how we were wondering if dwarf water lettuce would revert to the larger form if left alone? Well. It did.
This cute little mothbutt was hanging around. I have also seen butterflies, hummingbirds, bees, and a host of other things come drink from the tub.