Dr Charlie Drewes at the University of Iowa is a noted authority on blackworms. He has instructions on his website on maintaining and breeding the worms. Here is the link http://www.eeob.iastate.edu/faculty/DrewesC/htdocs/LVCULT.htm . None of our LFS sell live food, but our local fish club purchases a monthly supply of the California Blackworm. Individuals can purchase the worms in pound or half pound bags at the meeting each month. I know of few people who bother to raise then when they are available on a regular basis. If you care for them and change water each day and keep them refrigerated thay will last at least a month without going bad. Momma doesn’t not permit live creatures in HER refrigerator so one must keep a small cooler unit in the fishroom. Refrigeration is a must for maintaining these live foods in my very warm part of the U.S.