the only large pet store chains in Montreal are Safari and Nature petstores. there are smaller shops but no Petco/Petsmart. walmart did sell betta atleast 10yrs ago butthats been long discontinued, though the tiny "tanks" are still in large stocks. theres one Safari close to my parents' place and they keep nearly all betta in mason jars no 1 gallon jars arent there, only .5-.75G. they do keep 5 betta along with goldfish in (1 betta per 5G goldie tank). the water is cold but yesterday i saw that 1 blue ct has a full filtered tank to himself. either they sold the goldies and are waiting for the ct to sell i. maybe i just caught them inbetween restocking. this tank is actually noting the betta in it. the other 5g tanks dont even mention a betta along with the goldies.