I recently transplanted a couple D. adelae into a classic terrarium and I've noticed that one of the plants has aquired something odd. On its crown there is a small tuft of orange-ish fuzzy hair. Could this be a reaction to the change in conditions or is it some kind of fungus? Keep in mind that I transplanted two other plants and they haven't gotten any of this weird fuzz on their crowns. Should I treat my plant with a fungicide or what?