Measuring/ controlling humidity

[deranged chipmunk]

That is an excellent question, which, unfortunately, i don't have an answer to since i don't have darts. Maybe post something in the dart section? Hopefully, you'll get a proper response from don or john.

[tylototriton]

I think in general many dart keepers (maybe that should say breeders) use glass lids on their cages. They keep the humidity up and the flies inside, but they also limit airflow. I haven't seen any ill effects on the frogs from this stagnant air nor have I heard of any. However, at least in my cages, which get diffuse natural light, I frequently get a lot of condensation and even algae growing on the sides. I think little computer fans might help to keep the glass clear, but frankly that doesn't matter too much to me. However, it would probably be pretty depressing to make a beautiful display tank and then have the class turn into a slick of green algae.

~Alex