seen some in an incubator a couple of days ago with coastal eggs so i would think around 28-30 degrees and 1.1 vermiculite. but i have not bred these so dont hold me on it
At 28-29 degrees you should get one male one female after about 65 days. There has been some suggestion that lower temps 26-27 you get two females and higher 31-32 two males. Not sure how accurate this is though.
Here is a good basic care sheet:
Rocket, if the vermiculite and water were measured out at one cup full of each, you would drown the eggs. 1:1 by weight seems to be a safe ratio, though i myself will always mix it a bit drier.