Ok getting the following:
5 gallon Zoo Med UTH
Water bowl

Have:
Thermostat
Aspen
Accurite
Small RBI hide
6 qt tub (drilling 5 holes on the sides and 2 holes front and back)

Will be done with it by this evening so he can be transferred.

Thanks you!!

Also 6 qt for the next month? Then move him up to a 16 qt for another month or so then once he is about 300 grams put him back in the 20G right?