If their tanks have been in use for a long enough peroid of time and are cycled themselves then yes! Are you talking about putting them in another Biorb or in a normal tank with an internal filter. If your putting it in an internal filter it may be a little harder but still achievable. You'd just have to transfer them quickly from the Biorb to the filter by cutting some space in the sponges you have. Depending on the size of tank you have you may need a considerable amount which could provoke some mini cycles in their tanks.
So basically what I'm asking is:
What size tank do you have?
What type of filter do you have (internal filter, external canister filter, Biorb undergravel style filter or a HOB filter (Hang on back))?