Live bloodworm supply

I'm trying! Found some in an old bin a while back, that had accumulated rain and some dodgy looking debris. Actually, there was an astonishing variety of tiny creatures: still haven't identified them all. I thought they looked like good food, so netted what I could, left them outside in a jar for a few days, changing about half the water each day(hoped to "cleanse" the critters?) Praps I was just wasting my time! Then I nervously fed some to the goldfish(dummy-drive!) who gobbled them all up. And then the tankfish got a turn, with the same result. Since seeing your thread, I've collected some leiwater(no chemicals) and parked an icecream bak with nice rotting plant stuff in the sun, to see if I can grow some. Only started 4 days ago, and no results yet. Is full sun right?

 

Im trying this.I have 2 5l ice cream bowls outside with some pond slime and water(clean water).I have some snails in there as well.Hoping they will start to breed.