Oct 19, 2011 #1 T tumblewed Aquarium Advice Activist Joined Jan 18, 2011 Messages 131 Location conneticut just a question is a 15 gal consiterd a nano
Oct 20, 2011 #2 all4wheels2 Aquarium Advice Freak Joined Aug 30, 2011 Messages 310 Location Colorado Pretty much anything under a 20g is considered a nano
Oct 27, 2011 #3 Greenturtle Aquarium Advice Addict Joined Aug 19, 2011 Messages 1,169 Location Virginia I think 1-9 is pico, 10-39 is nano, and 40+ is just a big tank