I am getting ready to have my first clutch of veiled eggs. I am thinking of getting a thermal hova bator http://lllreptile.com/store/catalog/reptile-supplies/reptile-incubators/-/thermal-hova-bator-incubator/ . How much vermiculite would I need to last me for the whole time? Does this incubator control the humidity? And can you control the temperature for it. Any information would be great thank you.