Well if it was a wild caught juvie/adult pygmy then 8 months isn’t too bad. I highly suggest not using a dart frog like setup … they are just too humid and do not have the necessary air flow required for a chameleon. I have been keeping pygmies for almost three years and have no issues with an average humidity around 55-60 with them along with a couple good mistings each day. Here are some links for them …
http://www.chameleonnews.com/brevcare.html
http://www.chameleonnews.com/stumphabitat.html
If you live in a super dry area then this article may help. My preference is to always try and get the room humidity up but sometimes that’s very difficult especially if you don’t have a room dedicated to chameleons.
http://www.chameleonnews.com/humidifier.html
-roo