Saw it in one of Chris's responses and for the life of me could not find it to quote it.
Yeah- I just cited his article a couple of days ago to support glass.
We have different opinions on why glass was not successful before the new glass terrariums with the vents and doors.
Chris explains the ventilation which you repeated. My strong belief having lived through it is that back in the mid 90s, Ken Kalish and Ardi Abate took over as editors of the CIN newsletter and they had a very strong belief about the need for screen enclosures with unlimited ventilation. This was repeated over and over every newsletter at a time when the popularity of chameleons was growing dramatically and when the main source for dissemination of husbandry information was their newsletter. It was a great newsletter, but in some ways not too different from getting caresheets from only one breeder as care guidelines had to conform to the editor's views (and prior to my letting my subscription run out, most of the species breeding articles were actually written by the 2 editors with input from other breeders).
The newsletter was excellent stuff, but it pre-destined the widespread circulation of the strong belief that screen enclosures were mandatory.
So, my explanation as to why glass tanks were unsuccessful previous to the new front opening ventilated glass tanks is much simpler.
It has nothing to do with the new tanks vs the old aquarium tanks. It had nothing to do with the new improved ventilation system.
I used tanks successfully for several years, another well respected forum member who has some of the longest living chameleons on record has used them for many years longer than I did and still uses them today from what I gather.
The reason they weren't "successful" is because they were never used because most people insisting that glass was bad never tried glass. They were just repeating what they had read or been told and trusted it. Those who had used glass, were told they were unethical because chameleons *had* to have screen enclosures. Never mind how well the actual animals did- can't let the facts get in the way of what the chameleons needed.
So pretty soon people like me just stopped talking about it. Which is why I probably talk about it too much now. LOL
The funniest part to me might be why the unlimited ventilation theory came about in the first place. Chameleon breeding pioneer and chameleon behavior researcher Robert Bustard of the UK emphasized the need for plenty of ventilation in his early published articles. But then his definition of of plenty of ventilation when one actually reads his articles was much less than an all screen enclosure- it was a strip several inches wide along the top of large glass or plexiglass boxes which he used for keeping his chameleons indoors. I'm not positive that is where this all began, but I have thought about it sometimes and think it entirely possible that someone read that point about plenty of ventilation in one of his articles, passed it along to someone in the chameleon pet community early on, and it gets taken to the extreme with the original source forgotten...
Sorry so long- I'll try to stay away from glass vs screen for a while LOL