I have tried making my own and it was always messy and ended up smelling terrible. I suggest buying a large bag of the medium from a place like carolina.com I always have a lot of flys on hand and it doesn't cost me much at all. Go to that website and buy the big bag of medium. It is pretty cheap and will last you for months.
I agree with Rick on the Carolina.com medium. They seem to be the cheapest. If you do use that medium though, mix a teaspoon of molasses in with the warm water before adding it. I get far more flies when doing that and the maggots eat most, if not all of the medium.
Thanks for all the help u guys! i'm thinking about making my own but i guess i'll buy some from carolina.com. i dont really wanna spend more money lol since i keep spending it on new stocks of fruitflies or crickets when i can breed them if i can
i'm finding my homemade banana fly culture gets moldy within a week even after i add some vinegar. should i be mashing it up and stirring the vinegar in? ( that's what 've done) i'm wondering if they'd prefer the skin more. does it have to be white vinegar? the one i used was malt.
well i use apple sider vinagar for mine and it does not mold up i also use white vinagar too i don't get mold. but don't use alot it will make a diffrence in the number of flies you get out of it
tiny bit of copper sulphate (that blue crystal you find in chemistry sets)... you really don't need much... pea-sized amount in a cup of water- and a few drops of that. Mould hates it and isn't toxic to larvae