I found an old "Sun Tea" gallon jug with a spigot on the bottom works well. I mix warm chlorine free water with ocean salt and shrimp eggs. I aerate and insert a heater, keeping the top partially on to avoid splashing. When the shrimp hatch (2 days), wrap the jar with black paper and shine a light on the bottom (after removing air stone and heater. When the egg shells are floating on top and the baby shrimp on the bottom, I use the spigot to "pour off" the shrimp with out the shells. The shells will stick to the sides of the jar. I stop siphoning at 1-2 inches of water is left in the jug. I then clean out the jug and pour the shrimp back in. I mix more solution to top it off and put the aerator and heater back in. The shrimp will last several days if not weeks. You can do 2-3 cultures and keep a seperate holding tank with aeration and heat. You can also feed them, but mine would be fed to the larva in 2-3 days. I would do 2-3 batches a week.
After 3-4 weeks, I would start introducing chopped live black worms and wean off of the shrimp. As they got bigger, I would cut/chop the worms less leaving larger pieces, until they are eating whole black worms. Then I would do the same for pellet foods.