Well, in DE, you can get a quart bottle of PG for $9 and change. About the other stuff.. I dunno. I put the PG in once every 6 mo, and distilled water other than that, and I don't have any problems w/ fungus and or bacteria. If you need something to control fungus, you may have to look at the big picture. Too much water...Temp..cigars too close to humistat..etc.