OGIGA
Dead Leaf Mantis
I ran out of my box of mash potato flakes a couple weeks ago so I started using a new box. It's a different brand. It's giving me a problem though. None of my hydei flies are producing maggots in there. However, my (flying) melanogasters are multiplying faster than ever (probably due to good temperatures). I don't know what's in there, but I guess if your flies aren't working in your mash potatoes, try a different kind.