Harvesting your MW
This is my MW harvesting method. Other people use different methods but I figure, if it ain't broke, don't fix it.
After the culture is up and running, as you can see from the image above, the worms swarm up the sides of the container. If yours are not swarming but are staying in the mixture, put an airtight lid on overnight and once they start to run out of air, they will climb the sides, making them easier to harvest.
I use a damp artists' paintbrush to wipe the worms from the side of the container, and I rinse them into about 10ML of water from the fry tank, in a plastic cup.
I then use a pipette/tiny baster/syringe or similar to collect the water, MW and all, and I drip it over the surface of the tank, so that the MW do not all land in one spot or fall into the fry tank in clumps or dollops.
Where possible I make sure that I drip it over the java moss/other plants in the tank, so the worms don't all end up on the bottom, and so the fry are not resting on the bottom while feeding, but have to work for it a bit.
Good luck with your own culture!