no offense to you but my answer is a big NO!!!
10 gallon tank for 2 6 month old dragons???
for a single bearded dragon they need a 4x2x2 cage. means 4 feet by 2 feet by 2 feet. well height wise can be smaller than 2 feet, 18 inches is minimum height.
get rid of the walnut shells. suitable substrate can be, washed and sifted childrens playsand from toys r us, soil/sand mix, reptile carpet, newspaper, sealed ceramic tile, or non stick shelf liner.
UVB lighting is very important. reptisun 10.0 UVB bulb running entire length of cage.
heat source as well, get rid of that heat rock you have. they need heat from above. spot light with a typical house bulb or flood light works well. get a temp gun to measure your temps. you want a basking spot temp of 100-110, ambient temps 85-90, and cool side of the cage in the low 70s.
read as many caresheets as you can find. do not get another dragon until you get these 2 in suitable housing.
-----
Judson
Beach Beardies
0.1. bearded dragon
1.1. Sugar Gliders
0.2. Felines *queen athena and missy*