[header] How to keep a gerbil safe around other pets [title] Pick a glass tank that keeps your gerbils inside. [step] Gerbils have a tendency to escape if at all possible, which could lead to them coming to harm. For instance, they can squeeze out of a wire cage between wires, and they may chew up plastic to the point that they can escape. 
Instead, pick a glass aquarium with a wire-mesh top so gerbils can't escape. [substeps] The wire needs to be durable so the gerbil can't chew through it.