Hi there, and welcome !
A few things have popped out in your post that concerns me.
That
UVB bulb isn't the greatest, and I would recommend the ReptiSun 10.0. The Sun should be positioned so that your baby can get within 6-8 inches of it.
Your thermostats I assume are the round kind you stick to the wall of the enclosure ? Those can be as much as +\- 20*F off. The thermostat you want is similar to this one in the picture:
viewtopic.php?f=34&t=102209
You place the probe on the actual basking spot, leave it for minimum 45 minutes for an accurate reading.
What exactly are you feeding your new baby, and how often ? This is an excellent guide for what foods to offer your dragon:
http://www.beautifuldragons.503xtreme.com/Nutrition.html
You said Just got him/her. Does that mean today ? Or this week ?
New dragons go through an acclimation period, of several days to a few weeks. I am glad you did know that, as it can cause a whole lot of distress on the new beardie "slave".
On to the size of the feeder insects. They should be lengthwise no longer than the distance between the dragons' eyes. If they are larger, it will be hard for them to digest, and they will throw up or even worse, become impacted. You should also not allow excess feeder crickets to have free range in the viv after feeding times, as crickets are known to actually eat away at your dragon, and causing nasty wounds that can get infected.
You will want to feed an infant 1 salad and 3 prey insect feedings daily. You turn on the lights and offer the salad. Wait 1-2 hours than offer the first insect feeding, keep offering as much as it wants in a 15 minute time span.
Wait 2 hours (allowing the infant to bask and digest) than offer the second insect feeding, again as much as will ingest in a 15 minute time span.
Wait 2 hours and basking again, than offer the last insect feeding for the day.
You should not turn off lights before at least 1 hour, preferably 2 have passed to ensure digestion.
Also important. If your baby is giving you at least one poo a day, things are okay. This means he is eating something.
I don't know much about the calcium you are using, but this is what I use with my three boys: Rep-Cal Phosphorus free Calcium with D3. (Pink Label). This is the one to use with the ReptiSun 10.0.
I use this 5 times a week on the first prey feeding of the day, and on their salads.
This is the vitamins I use: Herptivite with Beta Carotene Multivitamins (Blue Label). I use this twice a week on the first prey insect feeding of the day and on their salads.
I would also remove the hide, as youngsters can hide, you want to be able to observe the youngster totally until he acclimates to you and his new home.
How old is this youngster ? This can also play a big factor. If the infant is less than 6-7" long from nose to tail tip, or younger than 2 months, you got a baby waay too young.
How do you have the enclosure decorated. What I am referring to is how much of his out of enclosure surroundings can he see ? Sometimes babies are very intimidated with the "big room", and stress out more. I would suggest making sure that the entire enclosure is newspapered or at least covered to mimimize this. You can leave the top where the screen is uncovered, but try to cover as much of the 10 gallon as you can.
Now, when you were choosing this little scaly bundle of joy, how did he react ? Was he active there ? What was his enclosure like ? Did he have tank mates ?
Lastly, how are you offering water to him ? Are you
bathing him 3-4 times a week in water that is up to his elbow, in temps between 90-100*F ? You will need to either hold him in one hand, making sure his anus is under the water ( This is how they absorb water to
hydrate themselves) for around 10-20 minutes.
I know this was long winded, but I wanted to make sure I covered all the basics.
I am quite sure someone else will chime in as well.
Hope this was helpful,
Janie.