That's a nice improvement! I can definitely tell the difference between the last update and this one. This is a really cool idea, and looks like it's turning out very nicely. The way you do maintenence is really creative, I would have never thought to clean it that way.
Thanks! The only thing about this method was that I did not take detailed photos of the Ludwigia's growth (and, well, all the plants' growth) before filling and draining; the added weight of the water weighted them down afterwards for photos. It's a very efficient method, though.