Are you planning to use this as substrate for a chameleon enclosure?
What sort of chameleon are you planning on keeping in there? Substrate is only recommended for pygmy enclosures.
For all other types of chameleons, it's best to have no substrate in the cage. That will make it much easier to clean, plus there is less risk of your cham swallowing something that may be harmful to it or cause impaction.
sry about that guys, was in a bit of a hurry when i typed that post and i forgot to mention it is for pygmys or possibly other lizards depending on the permit i applied for.