Thanks Albert, I stay away from the cypress mulch, not because of any bad experiences but more or a personal thing ... I like the paper towel under the substrate thought tho ... I may have to utilize and maybe tweak that idea .... I'm wondering if it could also work to the opposite effect that you were talking about in your application .... If I dampen it and then put it on the bottom of the tub and then add my dry substrate on top, it could possibly help keep the hatching tubs humidity up a bit for the first week or so while they adjust to the aspen from moist paper towels![]()