I just got my hands on a batch yesterday. So far so good... using old aquarium water and fish crap to fertilize culture. Also feeding golden pearls (50-100) microns to load them up with some vitamins before i feed to fish(they turn a bit red). Tossing in some turtle pellets to grow bacteria for them to eat and a bit of bakers yeast. I'm not gonna go for the dung method.... far too yucky.. can get plenty of dechlorinated water from my 3 tanks nearby to perform water change..