You won't find tubs that will fit both especially in height

For an hatchlings you want something like a 6 quarts or a V18 tub, for adults up to 2000 grams you want something like a 32 quarts tubs or or V35

Now you can make V18 and V35 tubs fit in the same racks but you you need to have shelves of different heights.

I recommend building separated racks for hatchlings and for your adults, you will find out that hatchlings tend to do better at lower temperatures compare to your adults, additionally if you want to lower your temps for breeding purposes this is not advisable with hatchlings.

Ideal material: Expended PVC it's lighter but sturdy and fire retardant.

For heat tape check Reptile Basics.