So it's about 80 cm x 40 cm... which works out to 3 or 3.5 square feet of floor space. That'll be okay for a short time but it won't take long for them to outgrow that. A single adult dragon needs a minimum of 6-8 square feet of floor space, which equates to about a 75g tank or larger per dragon.
2) Bask; 80-95C Cool; 75C
Night; 70C
If those temps are in celcius than they are way too high (90c work out to 190F). If they're farenheit then they need to go up a bit during the day. Your basking spot should be in the 100-110F range, and the cool side around 85F. At night you don't need to heat the tank unless it drops below the low sixties, otherwise teh cooldown is natural and healthy for them.
3) Min-Max Thermometer (bask light on timer and heat mat for nights)
4) Repto Glo 8.0 (20w)
5) About 5" away
Sounds good - is that thermometer digital? The stick on ones aren't accurate at all.
Housing dragons together is a tricky business since they are essentially solitary animals. If you keep two males together they'll fight, a male female mix and the male will constantly try to mate resulting in stress and injury for the female. The only combination that works sometimes is two females of the same size. You need to have a huge tank to keep multiple dragons, with multiple basking spots and feeding spots so that there is no competition between animals. You also need to be prepared to separate them at the first sign of trouble - there have been cases of owners coming home to find one dragon dead or severely injured because they just started fighting out of nowhere after years of living together peacefully. I'd personally suggest separating your little ones, its easier and less stressful for everyone.
7) About 3 months
8) Apple/carrot/kale/spinach, crickets and the odd wax worm for Widget
Apples as fruit should only be given occassionally due to the high sugar content I beleive, kale is also an occassional food. Check out that site I gave you earlier for more appropriate daily staples.
I'm not familiar with that product.
The crickets should be dusted 5 or 6x a week with calcium with d3 (phosphorus free) and the remaining 1 or 2x a week with a multivitamin supplement.
10) Desert Blend,Lizard Litter
Particle substrates aren't generally recommended for young dragons because like human babies, everything ends up in their mouth eventually and since it's not exactly digestible it can lead to impaction. Particle substrates also absorb some of the moisture from their waste and is hard to keep clean, so it forms a breeding ground for bacteria and the like. For babies, your best bet is a solid substrate like paper towels, ceramic or slate tiles, nonahesive shelf liner, or reptile carpet. Once they are adults (therefore less "licky" and more adept at catching prey without getting a mouthful of ground covering) you can put them back on a particle substrate if you'd really like to.
Hope this is helpful to you. There's a lot to learn when you bring home a dragon and this is a great place to do it.
-- Catalyst