Yes we do use tap water. What is confusing me is why this problem is only appearing in two specific areas around the terrarium. Tbh at first I thought it might be something in the soil of one of the new plants we bought but I don't know. The second area which has the same problem (apart that in the photo), is right around one of the last plants we put in the terrarium. If it's moss, wouldn't show all around the area where we have those kind of plants? I will try and take a cleaner picture when i get the chance. Thanks all
