They're extremely peaceful little fish, I have a group of 12 who gaggle about together on the bottom of my 12 gallon ( along with a single dwarf gourami ) . I would suggest a more mature tank (who's filter has been cycled about 4-6 months ) rather than a freshly cycled one though just to be on the safe side. I would also suggest getting at least 8 of them ( more if your capacity can allow ) as they really look and behave much better in a bigger group