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?
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.