I'm sorry, but this information/advice/characterization is pretty horrible... It's like saying you can keep your ball python in a tub that's half the size it should be or that we can lock our dogs in the bathrooms all day. Most rhac keepers I know - unless they are commercially breeding - tend to offer their adult gargs a lot more than a measily little 12x12x18. There's a big difference between survival and thriving though. So I guess if you only want it to survive, then sure, cramp it up in a 12x12x18. If you want it to thrive then put it in something larger.
I put baby cresteds, in pairs, in 12x12x12s and never have had issues with them finding their food. And I know someone that got a fairly small gargoyle gecko back at an expo in February and put him straight into a 12x12x18 without issue as well. A lot of people tend to baby their rhacs a lot more than they should be... I know a couple breeders that have large set-ups (around 60 gals in one case) naturally planted and with water features and they grow out their babies in that without losing any.
okay thanks, and for feeding gargys. how often do you use baby food/crested gecko diet and how often do you feed crickets?
1.0 Panther Chameleon
1.0 Gargoyle Gecko
0.1 Crested Gecko
2.0 Red Eyed Tree Frogs
0.1 Leopard Gecko