Is it common in the US that you don't use any substrate at all?
I know that in Holland and some other countries in Europe that they all use substrate too maintain the humidity, for the plants, for the females for their eggs.
I haven't heard of any breeder or keeper that they lost a chameleon because they used a substrate except for bark.
I agree.
In Germany the majority of Chameleon owners use a "special" type of substrate:
Basically what we do, is we go to the next forrest and dig out a barrow full of fresh forrest earth and chuck it into the enclosure.
Some people might cry out: "What the hell are you doing? Don't you know that this dirt is full of bacteria, slugs and other creepy-crawlies?
Yes, and thats excellent
I'll touch upon this topic later.
Let's first have a look at the clean US-way, without any substrate:
Because the bottom of the enclosure is wet, doodoo, leafs and dead feeders start to mold and a monoculture of bad germs can develop so that we consantly have to clean and disinfect our enclosure.
Meaning that we have to take out all of the plants and the chameleon out of its home every day, in order to clean it, which is connected with a lot of stress for the chameleon, shortening its lifespan and a lot of work for the keeper too.
Lets imagine we use a normal substrate like potting soil. The substrate will suck up most of the substrate, but dead feeders and poo still continue to rott unseen in the corners, so we still have to clean or swap the substrate regularly.
Now it's time to comeback to our forrest earth. In nature there is a variety of invertebrates and microorganisms called destruents, who rapidly start decomposing pieces of dead plants, or animals. And we can make use of them, through introdduncing them to our terrarium. These microorganisms prevent bad germs from reproducing in big amounts, and decompose poo and leafs in less than a week. If you're concerned about parasites, i can reassure you that it is very unlikely, that there are any parasites in the earth that could harm your chameleon, since most parasites are specific concerning their host. Additionaly the level of humidity is raised.
Of course good Drainage is very important too, the earth should never become to marshy.
On impaction: Small amounts of earth occasionly shot whilst hunting, normaly won't harm your chameleon (Im talking 'bout earth not Retibark or similar crap). If it deliberately starts too eat earth, then you must consider your supplementation.
I'm aware there isn't just one way of chameleon husbandry, but as soon as people start to cry out "no substrate", or "no glass", I would like to put in my point of view.
with best wishes,
albacheck