hi i have a population explosion of spring tails in one of my tanks the spider in this tank is about to molt and i know from reading on the boards here that spring tails are relatively harmless and mabye even beneficial but in very large numbers iam wondering if they may be stressful to the spider when it molts i also have read on here they may help control mold i have in another tank some kind on fungus or mushroom that looks like what we used to call puff balls as a kid but theres this nasty looking black dusty powder looking mold starting to grow on them has any one ever seen anything like this i wondering if i should clean both tanks out or maby put some of the spring tails in with the nasty looking mold and see if they would eat it any thoughts thanks chris..