Most local fish stores always have live black worms avaliable
However I highly recommend big Al's freeze dried black works... I believe he was sending out samples as well, if he's willing to give out samples there probably a good reason why
Thank you E1. I have to rent a car for trips outside DC and was hoping AquaMania might provide a one stop shopping opportunity. No matter, I'll stop at the Tropical Lagoon in Silver Spring.
Becca, you might find some information on keeping a daphnia culture in the Food, Water & Health forum, Frank might have some information he could PM you and I found this link, http://www.caudata.org/daphnia/#cult1a