Originally Posted by
cleanrshrmpfan
does size or weight have anything to do with it?
I think that anything 30 gallons and under is considered a "nano". Although Red Sea Max has a 34 gallon and is considered a "nano" tank. Then there is the Nano Handbook that says anything 15 gallons and under is a "nano" tank. Sooooo.... I'll err on the safe side and say anything 34 gallons and under?