white cloud minnows....!!~the best - easiest.
although if you want a super nice looking community, have neon tetras, a few white cloud minnows, an albino rainbow shark, or red tailed black shark, celebes rainbows. But....
for a 10 g, i would recommend, an established under-gavel filter with 2 - 3cms of gravel, an internal box filter (not internal power filter) filled with ceramic tubes and some filter floss, with a small bag of peat in a socking (for correct PH), and the tank will be sweat.
although if you want a super nice looking community, have neon tetras, a few white cloud minnows, an albino rainbow shark, or red tailed black shark, celebes rainbows. But....
for a 10 g, i would recommend, an established under-gavel filter with 2 - 3cms of gravel, an internal box filter (not internal power filter) filled with ceramic tubes and some filter floss, with a small bag of peat in a socking (for correct PH), and the tank will be sweat.