I have an idea that I could make a canvas screen work as a dedicated copepod breeder. Just need a little fuzz to grow on it to feed pods and therefore mysids. I have roughed up a screen and attached it to the bottom of my waterfall screen. It gets a little circulation from the ATS and it's bubbles. For lighting, a single one sided 20watt CFL about 9 inches from the screen. If it works I will make a separate build so that it is not removed every time I clean my ATS. If I can get the algae to grow slightly faster than it is eaten I reckon it could be left in situ.