Can small turtles live with crested geckos in a large terrarium?

I'm sorry but I really can't see ANY way for this to work. Most turtles require large tanks. Giving the crested gecko adequate space will really cut down on the water space for the turtle. Turtles are diggers, and would likely dislodge the decor the gecko uses and knock it over. I've heard rumors of crested geckos drowning in larger water features, but I will clarify these are only rumors I don't know how dangerous it is. It's also very likely the turtle will try to eat the gecko.

This is before considering temperature differences.

the prospect that others have suggested is actual, the turtle may even see the gecko's little limbs and tail as snackfood to be tasted. Mourning isn't person-friendly to be thoroughly impossible in reptiles, even if this is often considered no longer likely. that does no longer mean you're imagining issues however. variations on your gecko's habit because of the fact the dying of its cage-mate may be a symptom of regardless of grew to become into incorrect with the different lizard. it may be something so straight forward as wanting a transformation in foodstuff ordinary or habitat (temperature, lighting fixtures, or humidity). This time of year, per the place you reside, issues like compelled-air warmth vents or window drafts too close on your reptile could be culprits of a decline in well being. to no longer reason undo concern, yet ailment or parasites could reason sluggish habit too, so just to play it extra suitable risk-free, you do no longer choose show your turtle to a skill ailment by introducing the two. i could advise giving the gecko's enclosure an further cleansing and protecting a distinctive eye on him for a whilst earlier letting him socialize with the different reptile. If the gecko's well being does not decline, even if it nonetheless seems lonesome to you in some weeks, then that's safer to get him yet another gecko his own length to stare at. :) stable luck!

Sorry but you can not keep crested geckos and turtles in the same tank. This will not work out. They both have completely different housing requirements. By the way what kind of turtle is it you are talking about? But I'm certain that you can not keep them together and hope for them to live.

How large a terrarium did you have in mind? The turtle needs at least 10 gallons of water per inch of shell. That could be anywhere from 40 to 200 or more gallons when the turtle is full-grown. Then add in what the gecko needs. It doesn't sound practical.