Quote Originally Posted by nathanledet
I have no experience with that particular substrate, but I do know that Aspen bedding works fine and there is absolutely nothing wrong with using plain ol' newspaper. If I were you, I would take that bedding out and replace it with newspaper. Personally, I like to put a layer of newspaper down and then a thin layer of aspen bedding.

edit: Check out this thread. It has a poll with everyone's preferred bedding and bed-a-beast is not listed. Newspaper is preferred amongst most, and aspen is in a close by second place
Isn't Bed-A-Beast just one of many coconut fiber substrates? That's what I use and I was under the impression that is what it is. I could be wrong though. If it is though, then it is on that poll, although it didn't rank very high. Check out this one too http://www.ball-pythons.net/forums/s...substrate+poll.

As for the original post, I would assume that is mold, but I don't know. Assuming it is, I would completely empty and clean your tank. Might as well do the whole 9 yards while you're at it... cleaning, disinfecting, etc. I personally haven't had any problems with mold growth on coco fiber. I empty, clean and disinfect my tank every 4-6 weeks. Newspaper and paper towels work too. So does aspen, cypress and every other substrate listed in that poll. Keep using coco fiber if that's what best suits your needs. Or you can experiment; your call. Good luck.