He needs calcium daily for the first while, multivitamins 2 times per week. It looks like your using a compact/coil uvb, if so it needs to be replaced asap, they are horrible. Please use a long tube fixture a 24 inch fixture with a 22 inch bulb would be ok. Arcadia 12% desert t5 or a reptisun 10.0 ho t5 are good bulbs.
Beardies are notoriously hard to get to drink, some will drink in a
bath, most won't. If he doesn't drink on his own you can use an eye dropper to drop it on his snout. If he still won't drink you can add a little none citrus fruit punch to give it flavor. Don't force the water into his mouth and be patient, go at his speed. He should lap it off his snout. If you go to fast or force it it can aspirate him. You can also get water into him via greens if he eats them well.
I also see the stick on guages, thise are very inaccurate. You need two digital probe type, obe on the cool in and one to get actual basking temp. The ir guns are also inaccurate they read off of the material and don't take the actual temp of the light into account. The probe type actually reads the temp of the actual light so you can pin point your temp.
I knowcyhis probably seems overwhelming but once you get it, it becomes 2nd nature. I know it can seem like some of us (especially me lol) are a bit preachy but its only because we want you to have the best experience with your beardie and him to have the best life possible. I know I've made every mistake possible, and i just try to save everyone else the headaches lol.