I'd give them a call. The mom and pop types are your best bet. Here they don't anymore. Too much risk introducing them to a central system. At least with diseased fish farm stock they have someone they can blame. Not that it gets them any money back.
Here some of them will "take"them for free. And they act like they are doing you a favor.
Worth calling something fishy, world of fish, aquatropics, etc. not sure where in MPLS area you are.