In the small rubbermaids....in 2 of them, 2 females that have just spent time with the male and in 1 of them, 1 male and one female.

In the medium rubbermaids...Each has 1-2 females that are about to have litters...if there is only going to be 1 litter I usually put in a 'helper' mom

In the 10 gallon tank...whatever....I will usually move a mom and her litter to the 10 gallon when the babies get a little bigger.

A few are empty right now....I got carried away the other day and fed a few breeders