Calcium/uvb for bearded dragons?

If you sprayed calcium water on the dragon, the water would evaporate and the calcium would be left deposited on its scales. Think about hardwater stains, that's basically calcium deposits. The best way to supplement your dragon with calcium is to use a calcium vitamin suplement powder that can be sprinkled on it's veggies or coated on the crickets. Its like shake and bake. You don't need to give it calcium every single day, but a few times a week is good. I would use a uv bulb that is made more desert reptiles, not an aquarium bulb. Plants use light that is in the visable spectrum for photosynthesis not uv light. Uvb light is very important for bearded dragons and it helps them get vitamin D3 and absorb calcium into their bloodstream. If you don't provide the lizard with proper uvb light and calcium, it will likely suffer from metabolic bone disease. It will cost you a lot more money in vet bills than it would to just buy the right stuff in the first place. I don't want to imply that you couldn't put calcium in it's drinking water but they don't drink very much and you would waste more money in the long run. As for uvb, some bearded dragon breeding facilities use outdoor enclosures but I wouldn't advise that unless you live in Arizona (or somewhere similar) and have experience with that type of enclosure. They could get cooked, escape, get stolen, or get eaten by a predator.