Hi,
This is what came into my mind.
I think the basking side can even get a bit warmer (up to 118). Don't worry if he refuses the salad. Just keep offering daily a fresh small portion. Usually, young beardies eat little to no greens, so they have to get used to it. Same goes for water. If he licks drops of water from your finger or his nose, try to mix the water with a tiny bit of vitamins before offering it. Also, you can solute some vitamins in his
bathing water (as they cannot store moisture themselves yet, they need a hand warm
bath daily in order to
hydrate them).
Don't offer food in the evening, while they need heat for digesting food. Better offer it in the morning. Reptisun should be sufficient up to about 97". I only think that the 10.0 was meant for adults and the 5.0 (or 7.0, I haven't this in the Netherlands) for babies. Also, provide sufficient vitamins and calcium (a bit over the greens, put the live food in a small bag with some vits and shake well before feeding them).
Mealworms are not proper food, too much shell and too little nutricion. You might be giving them as a treat, but not as a meal. You can slow down house crickets by putting them in the frig for about 15 mins or freezer for about 5 mins. House crickets cannot cope with low temps. You can also buy a so called cricket feeder, a small rock where you can put in some crickets. It has an opening just large enough to release one cricket at the time. However, crickets can cause stress to baby beards. They are after all nocturnal animals, while a beard is a day-active animal. So they run around if they can, sometimes making noise and prevent the beard from sleeping properly. So removing should be best. Provide food for the remaining crickets as well (leave the salad bowl in the tank during the night) to prevent the buggers eating from your beardie.
Perhaps the tank is open (full glass)? Then close 3 sides (back/side) and perhaps the top of the tank so you have only the front side open for view. Closing the top side is always a good idea: predators usually come from above.
Cheers,
J.