I have some troubles during winter time with feeding, – I use artemia extensively because these are easy to make. I always then try to have different other sources of food, but it becomes difficult when living in a flat (with my partner) – and no extra space. So the amount of cultures of live food that I can have in the cupboards is limited 😉 , moina dafnia is possible, but they often crash and dont seem to be a reliable food source for me to have. So then I have microworms which I actually use also regularly for the grown ups.
And the I buy occasionally live mosquito larvaes, or live red worms (red mosquito larvae) if I can get them in small sizes. But I not too fond of these anymore, have had a few accidents because of these I think, – either they are still too big or something else cause problems for the fish, or they pollute the water. So now I only feed like one or two pr. fish so that I have some control of it. And rather not.
In the sommer though, I use a lot of black mosquito larvaes, and they are excellent. Escpecially because I get them from my summer garten, – and I can get them in all sizes, and find a lot of really small larvaes. Even down to the size of microworms and the fish loves them. And I dont feel this food will be causing any problems, – I quess uneaten larvaes might actually end up developing into mosquitoes which of course could be a problem, however of a different nature.