An updated FTS. You can see the discoloration of the gravel here
My snail is slacking on the algae clearing on the sword, too. I might have to see if reducing my photoperiod will help that out at all :/ On the left in the back, you'll see the water lily bulb that finally sprouted; it started to grow a leaf within about eight hours of putting it in the tank, so something must be going right.
There is still something strange going on with the tips of the aponogeton, though, so I don't know what to do with that...