I don't have gerbils, and you know advice somes fast and free, I'd use what works for you. I have been using Aspen shavings for my hamsters for a couple of years now. Just last week, when I was buying more from the pet store, the lady suggested that I try Carefresh instead. I haven't subjected poor Olivia to it yet. It is gray and has a papery appearance. But I'll let you know how it works. She may hate it!