@Paul B , what is your routine/setup for hatching brine shrimp? @WesleyC , what is your routine/setup for culturing the copepods? It look like you have a ton of them in there.[/QUOTE] I put the eggs in salt water (used tank water) in the right side with aeration. Salt water on the other side. After 24 hours I slide open the door (which covers a 3/8" hole between the two sides) and put a light over the left side. Cover the right side with the eggs. In 15 minutes all the shrimp swim into the left side. Slide closed the door and open the valve so all the shrimp come out. The eggs stay on the right side. I strain them out of the water and add them to my feeder. All my pipefish, mandarins, ruby red dragonettes, cardinals and clown gobies are spawning and have been for decades. It takes longer than 24 hours for the eggs to hatch so I start a new batch in a small container the day before, then dump them in the hatchery every day. This all takes less than five minutes and costs pennies a day.