I have a mini spider plant in my bioactive crested gecko inclosure. It's dropped a few leaves but no miscoloring. I mist the tank a cpl times a day. Why are the leaves falling off?

I had to look mini spider plant up. I have regular sized spiders and very easy to care for.

Spider plants seem to prefer bright to moderate light in an area that temps are not too high or low . 55-75 higher to 85 when hardened off . Keep the soil slightly moist. Once a week watering is sufficient in spring and summer . Also allow the soil to dry a bit more between watering. What medium are the roots planted in?