Pretty neat, Ollie. Where did you obtain your Moina? If you said so, I missed it. I have had D. magna and D. pulex cultures in the past but they never lasted for very long. I found D. pulex to be more robust than D. magna and better for a wider range of fish sizes because they are smaller. I have tried to find D. moina in the past but they seem much harder to come by.
I had tried many times to culture my daphnia on green water but my green water cultures never did well at all. So, I had to switch to other foods. I've tried live yeast and that never worked consistently for me. I have never mixed live yeast and green water or other combinations, however.
Thanks for sharing your experiences. I've always found live daphnia to be eaten greedily by all my smaller and medium sized fish and it does seem to awaken their natural behaviors.