Try Zett's during normal business hours. When I've called, it seems more like your calling a household vs. calling a business. I want to say that they are in Drifting, PA., and the number should have an 814 area code. I have the number in an old date book if you need it.
I never did end up ordering from them as my fish guy was able to come up with some smallies from another source. I don't think that other source is still viable.
