Hello,
I don't think he is a pygmy, or a rankins, just a little stunted.
We can try to help adjust some of the specifics in his tank to see if that helps get him boosted
some.
We do recommend using a long tube bulb, instead of a compact/coil light for a better UVB
source. There are the T5 tube bulbs, which are high output tube bulbs. You can choose from
Reptisun 10 or the Arcadia D3 12% both of which are very good & do last awhile also.
You can pretty easily, order the tube bulbs, online if your local stores just don't carry them.
How often do you give him calcium supplementation?
You are using a digital probe type of thermometer? If so, his basking temperatures need to be
just a little higher. The recommended ranges for basking are 95-110. What sized tank is he in
right now?
Tracie