They don't have any sort of ordering online for Canadians at their Canadian site (
http://www.wal-mart.ca). If you search for aquarium, you get baby cradles! They only offer an 'add to shopping list to print out and take it to the store' which in my opinion is a complete waste of time. And they only seem to provide a very limited version of their product list to begin with so what is the point of that. There is not one product for pets. There is way more in the store itself.
To top it off, they only sell two fluorescent tubes - an 18" one and a 24" one. That's it for lighting (and I checked two Wal-Marts). No hoods, no strip lights, nothing. So Canadian Wal-Marts are a step behind in the aquarium lighting department!