Dear Colchicine,
Thank you for such a well-written & thoughtful piece to jrbl. I wanted to add, however, that the environment itself that is condusive to the well-being of Corucia in captivity also spawns bacterias & other 'little' problems. It is awful here in South Carolina during the winter months to maintain the temps consistently as well as the high humidity. A good rule of thumb for those of us in the cooler & dryer climates during the winter is absolute cleanliness when it comes to husbandry techniques.
I do heat my 'swimming pools' during the winter to maintain 80-85 degrees. In the long-run, it tends to be less work than Corucia defecating all over the place when their preference is 'going' in their pools anyway. I change their water everyday & disinfect the containers everyday. This is not an easy task with 30 PTS but well worth going the extra mile. Like you said, why take the risk?
Also, during the winter, with several humidifiers going, a daily wipe down of every enclosure is required & necessary to prevent bacterias/ mold. I read an article years ago in Vivarium magazine where the author disinfected by using grain alcohol. Ever since then, i've employed the use of the cheapest Vodka I could find followed by sponging it off with warm water & I have never had a problem.
jrbl, I use Kane heat mats. They are pretty expensive but waterproof & very resilient to the wears & tears of reptile behavior. To be on the safest side, I also place a piece of cage carpeting over the mat just to insure our Corucia friends, with their long, sharp nails cannot puncture that protective cover. I run the cord out of the side of the enclosure to further safe guard against any potential accidents & then I place a grommet to seal the hole. These mats work really great in conjunction with a thermostat or rheostat. Just place your pool or soaking container on top of the mat & you're good to go. My skinks love those 16"-18" plastic plant saucers that are about 2" deep or so.
Good luck,
Sherri