A little bit of a new venture, for me... Ostracods...

[Magnum Man]

I tried ordering a few cultures... they are tiny... if they make it, & thrive... how are you guys catching them???
a trick I learned on the scuds, was suspend a chunk of vegi, into the tank, insert a net, & lift it out, catching the ones feeding...

these look smaller... maybe a pipette / turkey baster???

 

[MaloK]

I use a slice of cucumber, they love it.

I hang it with with PVC coated wire, then use a turkey baster to disturb seed shrimps all over the place.

While swimming they find the bait... After a while the cucumber slice becomes covered, I pull it out of the water rapidly, they all remain stuck.

Then I use the turkey baster to wash them in a container and put the cucumber back for another batch.