I haven't tried raising pods in bulk. They need some clean conditions, and cleaning big containers is not my favorite thing. I've raised all the pods I need in gallon plastic PETE jars, and that works for me.
Once upon a time, I raised tigriopus outdoors in a 17 gallon tub. I set it up with saltwater in the spring on a shaded patio, with bird netting over it, seeded it with tiggers and Isochrysis and left it to the force of nature. Tons of stuff fell into it, it rained, it survived no rain without top offs, and consistently produced tons of tiggers. It teemed with tiggers. No maintenance. Lovely.
In a separate time, I learned the hard way that contamination with tisbe of any culture will lead to the survival of the fittest. Tisbe wins every time. They eat other copepods or rotifers.