[hisnameispip]

M&M I meant the 5 gal per as a general go-to, as gerbils really should be housed in pairs, thus a 10 gallon minimum for a pair. The only reason gerbils should be alone is if they declan with their tank mate and cannot be successfully repaired to another gerbil, even through the split-tank method. If there has to be a lone gerbil, it would do fine in a 10 gal. I didn't mean to imply that a single gerbil could be placed in a 5-gallon tank, that would be horrible! Hope this clears up your question.