Having to talked to a graduate student at the oceanography open house at the U this weekend: I have confirmed the difficulty in raising your own. The major problems are that the cultures crash. You must have live food every day for the frye to survive. This in addition to making sure the right size food is provided at the right time. An additional problem is that there seems to be a nutritional switch: where live food does not supply the required nuritional content. At some point the larvae must be switched to dried foods or they develop a whirling disease, that is unsurvivable but only to a few.
Brine shrimp are too big even in the naupalii stage (just hatched) you must start with a moving organism in the ~100u size range. You can order live rotifers via internet but the cost is prohibitive on the scale that your are invloved.