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To start out, you need the basics. A suitable terrarium for one adult gecko is suggested at 15 gallons. But please by all means you can never give a pet too much space. The next thing you'll need is substrate. You can use sand, lizard carpet, paper towels, ect. You might not notice for a while because they're nocturnal but they like things to climb on like a big rock or a log.
Sand impaction is a big consideration. If you feed your gecko in the sand or don't provide any calcium into it's diet it might eat sand. And when a gecko eats sand impaction can occur and it's deadly. So called calcium sand is still not safe so paper towels or lizard carpet is a good idea if you want to prevent this.

Food

Large crickets, meal worms, super worms. Bugs, basically. You can dust them with calcium and multivitamin powders. Do NOT put it's food in sand. If you have sand in it's cage either place it's food in it's humidity box or on something flat and clean. And if you don't dust the food at all then forget about using any sand in the cage because geckos eat sand when they don't have enough calcium. Sand impaction is deadly. You can supposedly feed them with the food they provide at the store but more than half of them would die before I could feed them to the gecko. A piece of lettuce is pretty useful as food and water that doesn't drown them. And don't even try to give them water to drink. I've seen a super worm drown on a damp piece of paper towel. stare
I don't think I need to remind anyone but just in case, geckos do need water and you need to have a shallow dish to drink out of. If you keep crickets in the cage to hunt leave a sponge in the dish so the dumb things won't drown.

So to recap. All the items you need before you buy a gecko is:

Minimum 15g Terrarium
Heating Pad
Substrate
At least 2 Hide Boxes
Coconut Fiber
Water Dish
Heat Lamp [Maybe]
Calcium & Multivitamin Powder
Something to Keep Live Food In
Thermometer/Hydrometer

First of all, run a warm little bath for the gecko and use Qtips to remove any dirt or sand off the wound. Obviously you need to be careful. The gecko is probably already going to be stressed and sore but this is necessary. You can take another Qtip and apply some type of antibacterial cream like Neosporin to the wound.
Now that you've done what you can to the wound focus on the terrarium. Everything is going to need to be cleaned. Remove all the substrates and replace with paper towels so the wound won't get dirty again. Clean all the hides with hot water and leave the gecko alone for a while to destress.
Geckos keep a lot of their fat stores in their tail so you will need to increase the fatty foods and protein in it's diet. Don't be surprised if it's movements are slow and unmotivated for a while.

Usually tail loss is not a serious injury especially if you take the right precautions. But look for signs of infection like leaking puss. If the wound doesn't heal consult a herpetologist immediately for care.

i would recomend 3 hides, not just 2. you should have a warm hide, a cool hide, and the humid hide. that way your gecko will never have to sacrifice a good body temp for security. thats the reason that i dont recomend anything smaller than a 20gal for an adult though, anything smaller and there isnt much room for all the stuff they need

ive tried all sorts of substrates with ethen, but so far tile is my favorite by far. its so easy to clean and much better for their joints than sand in the long run. not to mention its probably as close to a leo's natural habitat as im going to get as long as i just buy everything instead of making it

I can't get on any search sites. Do it for me. emotion_donotwant

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