Gerbils need a very deep layer of bedding so that they can satisfy their nesting and tunnelling instincts. They will need at least five inches of bedding over the floor of the cage, so that they have enough material for creating these spaces.
As well as lots of bedding, your gerbils would appreciate a gerbil house, in which they can build nests. The bedding is usually pushed inside these houses by your pets, and they’ll be able to fashion something that will help them feel more safe and secure. These accessories also act as added privacy against humans peering in through the glass.
Gerbils like to curl up with one another when they sleep
Gerbils are diurnal, which means they’re usually awake during the day. However, those kept in captivity are likely to sleep whenever suits them, so they may sleep day or night. Allowing them enough material to tunnel means that they’ll have somewhere safe and dark to sleep whenever they’re tired.