that's basically what i'm trying right now... is that the completed mashed potatoes or just the flakes?Tneal has a ton of cultures. I use what he uses, instant mash potatoes mixed to a thick paste with water, then made into a slime like paste with applesauce with a dash of bakers yeast. Then I add a few dozen adult flies and I cover the culture with some pantyhose. Days later there are a zillion maggots, and a few more days after that plenty of new adult flies.