Daphnia are real new to me culturing them. I collected them out of the river many times and fed them to my fish over the years but never heard of them being grown indoors to feed fish during the winter until I was around killie people. I actually feed my daphnia a mix of foods that I got from several different people. On the yeast I learned real quick about feeding to much. I did as I was told on KT(killietalk). I put 1/2 a teaspoon of yeast in 6 oz of warm water. Let it soak a bit and then stir it up. I am glad I split the culture the day before. After it was well mixed I dumped this yeast water in one of the cultures and then rinsed it into the other one as it was still cold weather and the indoor green water cultures where not producing enough to keep the cultures fed. The one I fed died out completely. The one I rinsed the cup in did good. So the next time I mixed it like I was told and instead of giving the whole thing to the daphnia I gave both cultures a squirt of this mixture from my turkey baster. It was amazing how quickly they cleared this cloud up. So I gave them more. I continued to give them more of this through out the day. I ended up giving them the whole cupful of yeast water through out the day. After this it has been smooth sailing. I feed baby food sweet potatoes and peas from time to time and freeze unused portions for later dates. I also mix some paparika in with the yeast mixture after doing a lot of internet research. Paparika is full of vitamins. I now give the outside cultures some yeast from time to time to boost production over the green water(it is still the weekest link in this food chain).

  Like all of yall other hobbiest I still make mistakes. But I just try to learn from my mistakes. One thing I learned early on was how much better growing fish outside was over tank raised fish. I think it is a combination of UV light(suntan anyone), live food, and plenty of space for growth. They have great color and size and health. Well now I am getting close to those results growing fish indoors with live food and good florescent lighting(it produces some UV).

  Live foods are the main key to raising fish unlike you have never seen before. I have fish which have never seen flake food and are better looking and bigger that the parents ever got that were fed flake food and live foods. I am not real big on "clean" tanks either. I do my water changes and syphon the stuff off the bottom weekly if not more often but I do not clean my tanks until I can not see through the glass. I let algea grow and such. I learned a long time ago spotless tanks are not actually very healthy a lot of the time. Sometimes what you percieve as a nasty fish tank is a very healthy inviroment. The streams our beloved fish come from have algea and plants and bugs and much more that many of you would hate to see in your tanks. Life is messy, make mud pies, LOL.