Lemmings - Complete Care Guide Housing A plastic or glass aquarium, at least 2 foot by 1 foot for two lemmings, a lid will only be required if you have cats or other animals that would eat them! As lemmings cant jump (they are good climbers though!). Line the aquarium with either bone dry peat (dry it out in an airing cupboard for a week or so) or wood shavings and hay, needs to be at least 2 inches? The more the better as they love to tunnel and dig. The aquarium must be situated away from direct sunlight heaters and radiators, and somewhere that air circulates. Normal room temperature is fin