Biggest fish I could comfortably keep in a 125 Litre Aquarium?

Dawes

I currently have a 125 Litre Aquarium set up as a Community Live-barer Tank, but I was just curious as to what the largest Freshwater (Or even Coldwater) fish I could keep in this tank without it being overstocked, the fish being uncomfortable/stressed, or too low in 'company', etc. (Fish Profiles would be appreciated!)
Hypothetically speaking, to see what the boundaries of my tank are fish-size wise.
I don't intend to get large fish as I personally prefer the Smaller varieties of Live-Barers, Tetras and Gourami's etc.

I don't expect to keep anything as big as an Oscar, Arowana, or Larger Gourami, of course, since I know that is out of the question (Not to mention the fact I don't even intend to keep any fish larger than 5 inches), but for hypothetical purposes, humour me.

Dimensions:
35cm - W
80cm - L
45cm - H
(125L / 33 US G).

- Thanks.

Dawes

Anyone have any ideas?

thekoimaiden

You could probably keep one fancy goldfish in there. One of the varieties that tends to stay smaller like a ryukin or ranchu. Oranda and moors have a habit of getting huge. A friend of mine has a single ryukin in a 30 gal tank because he had a nasty reputation of eating eyeballs. You'd need some pretty good filtration, tho. And large weekly water changes.

1077

Perhaps a pair of Pearl Gourami and some smaller fishes Rasboras,tetra's.