Thanks for your thoughts (seriously) on the negative space. That's kind of what I'm shooting for so I have a lot of ground for shrimp observation. Really excited to have a tank that won't be overly planted.
Filtration: Eheim Ecco 2232/Easy 35. Making a 30"-32" spray bar to run across the back of the tank. Made one for a 20L that was about 28" long and it worked perfectly with the filter. Also crafted an intake from rigid tubing that's capped with a stainless steel shrimp strainer (or a sponge, if I get tired of the steel).
Gonna run a powerhead - Hydor Koralia Nano 240 to assist with any dead flow spots.
Likely sending you a PM because some 'U' tubes that I could use to connect hose with pipes would be awesome.