Looks sweet! What is that other tank under the tank now? Is that the pump? What exactly is it's purpose? I only had a normal filter on mine.
When I had my 55 gallon one I let it get way too overgrown with real plants which can be quite a hassle but the fish seem to like as I got the tiger barbs I had to breed in the tank. Also never get snails, holy crap they bred like crazy. I had Neons, Tiger Barbs, these weird eel-like fish, mollies, and few others The tank would get overrun by this moss plant I had in there, I don't know what it was called but it would float and that's where the they bred. I also had a bunch of those Japanese moss balls too. I really miss the hobby.