I'd like to set up a tank, but I'm limited on space. A 55g would be a dream, but right now I think the most I can do is a 10g (20x10x12). I think I could also do an 11g (32x8x10) if the increased footprint would be needed and/or beneficial. I don't think I could really do anything bigger than that.
I'd like this tank to be moderately to heavily planted and as self-sustaining as possible. I'm picturing it without a filter (not opposed to a filter if necessary) and with a large population of daphnia, copepods, and scuds (I know this might be tough with fish in the aquarium, but hoping some of these can be naturally sustaining).
For fishes, I'd like a pair of bluespotted sunfish and half a dozen least killifish. I think that might be a stretch since the sunfish might predate the least killifish. My backup plan would be to replace the least killifish with bluefin killifish and maybe drop their numbers down to around four or so due to their larger size. Also open to keeping a single bluespotted sunfish with the least killifish or bluefin killifish.
I think that's about it. What do you think? Will this work? Any thoughts or suggestions?