Thanks for trying it out though :).
No, one mosquito larvae is not much.
I have found that it varies how much I get out of these rafts, – some produce a lot of tiny larvaes, other dont really. And then I think it actually takes quite a long time before these tiny larvaes are even big enough to really be used for food, even for fry.
I also wondered about whether actually mosquito larvaes needed food to grow. So that just putting a raft in a cup of water wouldnt really meet their requirements 🙂 …
I still have plenty of mosquito larvaes in my garden ponds, so doing fine without rafts also. They are spendid food.