Hello again!
I´m still making my investigations … 😉
The “light method” is really good, but I´ve still now not found a bigger plastic bowl and the stuff to make the separation, but I´m looking for, to follow Deepin peats way to get a bigger amount of naupliae.
Till now I have now three of those black ones on my photo.
But I still didn´t give up the sieve method.
So far as I see now, I will need a sieve plus minus 0,2 mm .
The normal naupliae sieves of the hobby market are available in 1,0 mm, 0,6mm, 0,5mm, 0,3mm,0,18mm and 0,15 mm.
Relevant for naupliae are 0,18 and perhaps 0,15 (here you can get the very small ones).
In 0,18 you still find napliae and eggs if they come through 0,3 (directly the same, but it was the try to get them separated with that 0,3 😉 ). Therefore I guess the right size of the sieve must be between 0,19 and 0,23 perhaps ..
Now I´m looking for the sieve with the ideal size 😉
Normal european industrial tea sieves are not smaller sized than 0,5mm, thats already very very rare and fine …
I´ve found a website of an aquarist who sold last year naupliae sieves sized 0,2 mm, perhaps he will answer me.