Fish Gallery on Main Street and Selkirk is the biggest saltwater shop in the city, but stock truly depends on when you arrive. Right after an order there is usually a lot available … but stock moves quick.
Birdshop and Aquarium is also on Main a few blocks away … they have a few Saltwater tanks … but probably not worth a cab ride in my opinion.
Then you have Nestors on Portage … and he only has about 200 gallons of saltwater in his place.
Winnipeg doesn't have much in terms of a good Saltwater outlet … and In my opinion, nothing that is going to justify a $40 cab ride from the Airport to main street.