So, it seems that a 5 gallon tank is now considered a to fit into the newer, more trendy, SI prefix nomenclature for tank volume descriptors as a "Pico" tank.
I'm speaking here of the Ecoxotic Eco-Pico.
JBJ sells "Nano Cubes" from like 6 to 28 gallons.
Is there a standard somewhere? Is a 30 gallon a Micro tank?
What about my 3 liter desk tank? If 5 is a Pico, .8 must be like a Femto.
Who knew that my first goldfish I won at the county fair was chillin in a trendy Femto tank. Sweet!