Olivia Kapinos. Crested Gecko Care Tips and Beautiful Terrarium Setup for New Pet Owners. Posted: June 2, 2025 | Last updated: June 14, 2025. More for You ...

The size of your gecko’s tank (also known as a vivarium) is dependent on the gecko’s age. A juvenile crested gecko does just fine in a 10-gallon tank, but adults need a 20-gallon tank.