I remember another user on here saying that the he used aspen bedding and got mites. I used aspen bedding 4 year ago after 1 month of my first use all my bp got mites, i didnt think it to be from the aspen. so i used paper towel for about 6 months to clear them up and because i got them really cheep I pretty much used them for about 3 years now. but the price on them went up so i switched back to aspen and surly enough 1 month or so later i see my bp soaking but i didnt pay it no mined but after 2 months they were all soaking so now i know there was something wrong so i checked and they had mites again and I have 5 full racks full and each rack holds 25 snakes. so know im pretty much in trouble.. I really think that the bedding has mite eggs in them and as soon as they get moist they hatch. i was mite free for 3 years and 6 months untill a month ago, but just as soon as i started using the aspen they got it again. I have them under control now about $350 later in reptile relief spray and $300 in paper towels they should be fine in about 2 months, but i advise not to use any bedding, use paper towel or unprinted newspaper sheets.