Is this mold?

[trailblazer295]

So I've been using cocohusk as a substrate for my BP since soon after I got him where the winter climate and ambient house humidity resulted in low humidity in his cage with aspen. I could easily maintain 50-60% after switching. Now that warm weather has a arrive the ambient humidity is around 60% and since last week when I brought him back home (another story) I had set his cage back up with fresh cocohusk. For days the humidity was high 80%+. I tried having a fan set in the direction and opening the door to lower it but it would quickly climb back up. Today was his scheduled feeding day which he eagerly attacked so the move back home hasn't stressed him out he is still a eager feeder. I noticed this white stuff almost like spider web on the log half as well as other areas on the substrate. Is this mold? Should I be worried? I was planning to swap to cypress mulch on the next substrate change to avoid a predampened substrate for the summer and re-evaulate come fall. If I should change now is 24hrs ok? 48? I've always given him 48hrs after feeding before doing anything in the cage.