What can I fit in a 5 gallon?

[rainedance]

I have a 5 gallon tank with 2 fancy guppies and a ramshorn snail. Are there any exceptionally small fish or critters I could add to the tank without overcrowding it?

 

[JamesTasker]

An african dwarf frog perhaps.

 

[rainedance]

How big do they get? Are they completely aquatic?

 

[JamesTasker]

Um, a couple of inches I think, and yes, they're completely aquatic.

 

[littlefishie]

1-2" maximum.. they stay pretty small.
Just make sure your hood stays on tight, and that you get an ADF and not an ACF [African Clawed Frog].. ACFs will get huge, and eat your fish.