Advertisement I have recently come into issue with mould that has been the bane of my existence as a keeper since I've joined the hobby two years ago. It seems regardless of how well ventilated the enclosure appears to be, these small white dots will just suddenly appear and rapidly grow throughout the enclosure. The worst recipient of this is my pelinobius muticus, who will have to be rehoused a third time in just over a year as a result of this mould; you can imagine my enthusiasm to carefully remove her under 11" of substrate and destroying all of her eloborate burrows . I can only conclude that the cause can only be a fundamental issue with the type or brand of substrate that I use (peat moss mixed with coco fibre) or that I'm overtly pouring water on the substrate; which I usually do every couple of weeks. Springtails, which I introduce to all enclosures also seem to have no impact on the issue. I'm considering making test tubs to find the real culprit by putting two tubs of peat/coco fibre and having no ventilation in the one tub and soaking the other. I'm also wondering if adding various species of worms into the enclosure will have any impact on the mould, as I've read somewhere that they aerate the substrate. Anyway, it seems topsoil will be used in the next enclosure. I also appreciate any advice from those who have had issues with this type of mould.