A male veiled will have tiny spurs on the "heels" of his back feet.
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Source:
https://aminoapps.com/c/reptiles/page/item/veiled-chameleon-care/L2Yx_Y4lHBIGJwzwN7lMr8Z7rWkwnx2rjEr
Mealworms won't hurt occasionally. Here are some charts on best feeders & gutloading them:
https://www.chameleonforums.com/care/images/
Too much D3. You'll need some calcium without D3 or phosphorus. A good system is pick a day of the week (I use Sundays BC that's the day I clean enclosures).
Alternate Sundays get calcium with D3
or multi-vitamins (not both)
Every other day of the month dust with calcium without D3.
Very soon you'll need to upgrade to a larger enclosure. Minimum of 24"x24"x48"H All-screen is OK depending on where you are; hybrid (solid sides & back, screen top & front panel) is usually easier to control the environment.
12/12 is good. You should have a T5 HO linear UVB, either 5.0 or 6%. This is to prevent
MBD.
Temps are good.
Excellent!
That's good for daytime; nighttime should be 70%+ Good news is you live in FL and when nighttime temps drop, humidity goes up.
It's be a good idea to use a couple/few digital hygrometers with probes. The all have integral thermometers as well, but they're far better than analog dial types, which can be notoriously inaccurate.
Nope. Get real plants & vines
only, especially with a veiled.
Live plants help increase and maintain humidity.
Here are 3 lists of chameleon-safe plants from reputable sources:
https://chameleonacademy.com/plants/
https://www.madcham.de/en/pflanzen-fuers-terrarium/
https://www.chameleons.info/l/safe-and-unsafe-plants/
Air changes with fresh air is healthier, which is why glass enclosures are frowned upon with chameleons. Their habitat is so humid & warm, some nasty stuff can grow.
Other folks may have some other input, which is good.