The hobby is virtually non existent here in the Atlantic provinces. There is a bit of activity in and around Halifax and Charlottetown, but that is almost entirely marine. There is East Coast Aquarium Society but participation is sparse at best.
In New Brunswick we have PetSmart and I think one independent in Saint John of similar caliber. Thats it.
I cant so much as pick up a healthy sword or anubias in Fredericton, and forget about hardware like aquariums (other than starter kit crap).