Hi.

I'm thinking of building a new rack but thinking of using bus/utility tubs instead of the cement mixing tubs. I came across these Rubbermaid ones and was thinking of keeping 4 females per tub and 1 male rotated in. Would 5 rats be too cramped in these tub?

Bus/Utility Box
Dimension 21.5" x 17-1/8" x 7", 7-1/8 gallon capacity