Upgrading Hatchling Tub Size ?'s

http://i1022.photobucket.com/albums/...n/102_1267.jpg

I only got three babies in this rack, and they are slowly starting to get too big for them. What is a good size upgrade for sub-adults?

Are those 15's? Most would upgrade to 28 or 32 qts from there.

Those look like 6 quarts, then go up to a 12 quart or 16 quart tub. If those are 15 or 16 qt tubs, then go up to 28 or 32 qt tubs. Rubbermaid or Sterilite doesn't matter.

I see they are in 6qt shoeboxes, you will want to upgrade to 15qt rubbermaid w/latching lid

I'm pretty sure they're 6's. But I really don't want to have two grow out racks, and then an adult. I think I'm gonna go with a 28qt setup. Thanks a lot guys