Pups

[Beavis Miner]

How early could I be able to tell if my gerbil is pregnant?
Also I heard I should have nothing in the tank when I have pups except the
bedding, a hiding place and some tissue paper. Would it be ok if I put in
maybe a toilet paper roll in there for her to chew apart?

Thanx in advance for answering yet another question of mine,
Wee