Is Gorilla silicone safe for bearded dragon tanks? What's a safe option?

Any wood stain an be used. A water based product would be safer than an oil based one. Sealing the wood after staining would be strongly recommended. Use a water based polyurethane sealant. Allow complete curing/drying before using the enclosed. The general rule is if you can still smell the paint/stain/sealant, then give it more time to dry.

Echevaria (hen and chicks), Dracaena, Marigold, Boston fern or Bird's Nest fern are safe. Be forewarned though, any plant you put in the viv will be eaten or trampled. You may also have difficulty maintaining proper humidity levels with live plants.

Bearded dragon owners can also add plants to the habitat, but take care when adding real plants. If a live plant is in the habitat, the bearded dragon might decide to use it as a snack. If the plant is toxic to bearded dragons, your pet could end up very sick, or dead. Artificial plants are the best option since they are easy to clean, never need water, and are very naturalistic. Most pet stores carry a wide variety of artificial plants to choose from. If you decide to use live plants, junipers are one of the most recommended plants to use. Junipers are slow-growing and do not require much water.

Thanks for your question about Smaug, and thanks for the photo as well! I think that you have a good start to your set up, and that we can tweak a few items. First, your lighting situation appears adequate - I see a UVB light (please change this bulb every 4-6 months), a basking light, and a ceramic heat bulb. I would ensure that your temperatures are appropriate for this species, and that you are monitoring them using digital thermometers (I think that you see both a digital and analog thermometers currently) at the level of Smaug. Analog thermometers are inaccurate, so I don't recommend using them (also, they are high up on the sides of the enclosure, so they wouldn't be giving an accurate temperature read for Smaug). For the cage furniture that you have, I like that you have places for Smaug to climb and hide. However, I would recommend having a hide on both the warm side of the enclosure and the cool side so that Smaug has choices. Same for the climbing structures. I may have missed a food and water dish in the enclosure - I would recommend that both of these be shallow, and be large enough for Smaug's entire body to fit within them. I cannot tell what type of shavings that you have on the bottom of the enclosure, but the only wood shavings that I recommend are aspen shavings. If they are pine, these can be irritating to the respiratory system. I hope that gives you a place to start, and thanks for using Petco Pet Education Center, formerly Petcoach!

I agree with the sites claiming sand is dangerous for your beardie, i have seen many beardies with sand impaction, many of them too far gone to be saved, i strongly recommend any of the other alternatives for bedding as they are all safer than sand.

The ReptiSun 10.0 bulb by Zoo Med is widely recommended. It should not be obstructed by either glass or plexiglass or be more than 18 inches away from the basking area. If you can't get one just yet, natural unfiltered sunlight can be provided daily if you can do it safely and without risk of escape.

Choose the largest cage your space and budget will allow. At minimum, a 55 gallon enclosure should be considered. Acceptable substrates include slate, reptile carpet, decomposed granite or large gravel. Yes, setting up a bio-active environment for beardies is possible. It will take a bit of research and effort to get it right.