The pic I posted in the above post if of my yearling Biak.
She's quite large for her age and grows in the rate one can expect from a baby GTP.
One last tip if I may- I would advise if at all possible, to use digital hydrometer rather than the analog one. Accuracy is essential with these fellas. Also, I would position both the thermometer and hydrometer's sensors at the levels of the perches themselves, or at the middle-where she will mostly be (personally I would make sure to have one higher and one lower perch).
I simply had a rather bad experience with Exo's analog hydrometer... and with GTP's... you can afford very little mistakes.
Anyways, hope these tips help- of course I am not saying I am an expert or anything. Just what I learned over time