pip walters
Aquarium Advice FINatic
I know more than a handful or two that do, myself included. All my fish purchases come from importers and when they arrive, they're packed with meth blue. You don't want any of that in any tank as it's such a PITA to get out.
I agree there. No way I would put the water in from newly imorted fish. Plus, they would definitely go into quarantine. Some fish are imported with mild sedative in the water too!