Caresheet:
Pangea
How big is the subadult? Is it offspring from the pair? I'd seperate it from the other two so it doesn't get beat up or stressed out. It should be fine in the 20L for now. A 29 gallon tank or similarly sized tote (Rubbermaid, Sterilite, whatever..) with holes in the sides will work great for the pair if you want to keep them together. Or you can keep them seperately. Most people seperate their pairs at least a few months out of the year so they have time to rest. They don't need a super-tall cage, just places to climb and jump around.
Do you know what the previous owner was feeding the geckos? GCD with or without occasional crickets is best. If you don't already have it, it's pretty easy to find. Petco carries it, and so do many people who sell crested geckos and supplies online. I get mine from
Gecko Ranch. Most will use a water bowl, and it'll help with humidity, too. Mine like mushed banana, apple (not applesauce), and peaches.
As long as the temps are between the high 60s and low 80s (max) you should be fine. Mist once or twice a day, but make sure the cage dries completely between misting. Don't feed babyfood. I know I'm missing stuff. Other people will let you know what I've forgotten.
Post pictures!
