im looking into getting some gerbils soon, but i want to know if i can house 1 male with 3 or 4 females???

also is their house the right size, i have two vivs that have a tube going from one to the other, and the first viv measures 24inch l x 18 h x 18 w and the second 18x18x18inch, giving a total length of 42 inch.

help would be great
thanks.