They’re arboreal geckos (ie, live in the trees). So if you put vines and vined plants in your tank your gecko will be happy. They also like it if you put long branches almost virtically in there. If you make a hiding box, try to find a way to put that up high as well.

I recommend feeding your gecko mealworms (dusted and calcified) every other day, as much as they’ll eat (I say 5 to 10). And don’t worry if your gecko doesn’t eat after you first get them, sometimes it’ll take 2 weeks before a new gecko is comfortible enough to eat.

As for substrate, DO NO get sand, gravel, or any loose grounding since this could kill your marbley. I recommend finding a soil or soil/bark mix for jungle geckos or rainforest geckos, since that’s what a marble gecko is.

What else. They’re nocturnal. And the temps should be at the warmest 85 to 87, coolest 75.

They’re mainly display geckos. So unless you really need to take him out of the tank for a vet visit or such, I recommend you leave him alone. They bite, but as many times as I’ve been bitten by mine, he’s never really drawn blood. Just a bit pinch. However if your gecko does bite you and you bleed, wash the wound thurrowly with soap and monitor it for a few hours. If it swells, contact a doctor.