I do have a hatchery/feeder that I use when I leave for a week but I don't have a picture of it. It is basically a box about 5"X5" that sits on the bottom of the tank. There is a 3/8" tube to the surface with a funnel on it that is about half out of the water.
Above the funnel is an auto dry food feeder that dispenses brine shrimp eggs into the funnel and there is also a small supply of water that trickles into the funnel to aerate the eggs and push them down into the box at the bottom.
The box has a screen on the top exactly like my daily brine shrimp feeder and a stocking can be used.
The eggs constantly hatch and swim out through the mesh for the fish to eat. The mesh keeps the eggs inside.
After a week I remove the thing to remove the hatched eggs. I have been using it for a few years and seems to work well but I use it for mandarins and pipefish.
There is a picture of it in my book but I don't have time to copy it right now.