you can keep a betta in one nicely... iv got one of theses =D iv had 5 minnows and 2 goldfish in it before (when i first started and was into cold water)
you could get away with 5 neons. although they like to school and wont have much swimming space in it...
your looking at about 5-8 smallish fish
but id put one really nice betta in there and like 3 shrimp? ... are you going to plant it?
Thanks. I'm only going to see if this hobby will work but by the looks of all these tanks on here i think i might stick to it! If i can't fit many in I'll probably save up for a new tank. What size would you recommend? (Gallons)
umm.. id recommend the biggest tank you can get. more water = more dilute solutions of whatever pollutants in the water, this means its easier to maintain a balance
for the 20L tank you should get a betta =D they look really nice.
here's my tank
its got a guppie and a neon in it. but it would look great with a single male betta =]