Whites shedding problem??? plz help

[illadelfyaEAGLE]

I have just noticed that i have some type of mold in my substrate. There is a cluster of small balls, about 0.5mm each surrounded by a halo of white fuzzy mycelium. The clusters are located in the substrate, not on the surface. Don, do you see this type of mold in your terrarium? I dunno what type this is. It could be a harmless decomposer or it may be the culprit.