I'm using one for my BP and one for my baby sunglow BCI. I will be switching them to AP cages but for now they make decent homes. Just cover the whole top with a thick piece of cardboard wrapped in tin foil with a hole 1" bigger than the dome you are using and you will be fine. That's what I use with aspen and I keep 50-60% humidity. I toss a moist paper towel on top of their warm side hide under the CHE and just wet it twice a day.