I just bought two more succulents at Walmart today. A sedum and a new type of jade plant I didn't have. They have had these stocked for more than three months now, and I heard that the retail stores aren't the ones that use pesticides. So are they safe to put in my yearling's enclosure? And how should I change the root medium? There is so much root I can't really get the plant out of it's current growing medium.