Hello,
So sorry for the delay! Your lighting is very good now. Since you are using a T5 high output
UVB light, it will be conducive towards your dragon to efficiently synthesize D3 just from the
UVB exposure. So I wouldn't recommend using D3 when he is exposed to higher levels of
UVB. The synthetic D3 can in some instances, become toxic & build up in the system.
You mentioned he has had the head vibration before you were using the tube bulb? He may
have had some calcium issues due to not enough UVB thus inhibiting his calcium absorption,
etc & contributing to the head vibrations.
Reptiles recover slowly most of the time, so give him some time. Is he eating pretty well, for the
most part?
Tracie