Hrm well I think you've convinced me to make my 32.5 gal flex a congo biotope... looks like the crypts are coming out in favor of crinum calamistratum/natans, more anubias, bolbitis and uhhh maybe tiger lotus/water lily... and I've already got spotted congo puffers, maybe some upsidedown cats? african banded barbs? not sure if my puffers would like butterfly fish fins too much (might work, they don't seem to care at all about some guppy culls I threw in with them)... don't want to risk mixing my tetradon schoutedeni and teleogramma brichardi... maybe when the teleogramma aren't so tiny... maybe.
I think I gotta cheat for any form of algae control though, couple otos or something... shrimp and snails definitely will get murdered in short order... at least for me, my puffers are not so passive for shrimp sized inverts as your pic showed. Maybe 1/10 self cloning crawfish survives to a size they stop caring about but they definitely are all about trying to eat them when they're shrimp sized (I catch the bigger ones out so they don't get big enough to maybe blind one of my puffers)
I've got some christmas moss in there, pretty sure that's what it is anyhow I've lost track of which moss is which, but one that stays relatively compact/bushy as compared to java moss. Guess I gotta pull that out to be a biotope :/