I have Freedom breeder, Animal plastics and Vision racks and the Visions are very economical and you can have 3 differemt size tubs in the same rack if you want. I have one set up now with adult CB-70 tubs, juvinile tubs that are 2 tubs per level of CB 70 tub and then I have several levels of hatchling tubs which are 4 to a level. Try doing that with anyother rack