My VFT's traps are turning black. I don't know what's wrong. I have it in 100% peat moss, from a huge bale of the stuff I got from Lowe's. I also have been watering it with both rain water and water from the goldfish pond we have. I've been careful not to use tap water. I just don't know what I am doing to cause this. The only thing I can think of is maybe making the substrate deeper. Would that be the reason for it looking so ill?