Maryland is the same way. In MD obtaining a license is a big deal, since you facility has to be state inspected, etc, etc. I would say, if you are selling frags here and there to fellow hobbyists, I wouldn't worry about it. If you intend to invite people to your fish room to purchase frags, or operate a "store" I would seek to obtain the license. In some states, the penalties for doing business without the appropriate license are severe.

