Mimzy has learned the hard way. in Mycology Posted April 1, 2016 Nice Fred It leaves in awe of how finely balanced our ecosystems are; in the lab its always one victor over another... whether thats mold, mites or moths. This. Always this. Latest one here is to really isolate in time mushroom growing lab sessions from plant growing lab sessions. Even in FP bags actively growing mycelia attracts compost flies/ fungus gnat flies. Not many, but enough to get into the flow hood working area and the flow hood when it's on. Once one of them flies over your sterile work it's anyone's guess as to whether it's contaminated or not. So I clump all my myco work at the EOM and then spend the next week or so out of the lab til the ferment flies rack off.