Thanks for the links as well.
Malta, have you checked out Aquatic Kingdom on Dundas St W? (mississauga, not far from the Big Al's Mississauga), highly recommend it. If they don't have it, they'll get it... and much cleaner and better prices than Big Al's.
There's also Dragon Aquarium it the little china-town plaza beside Big Al's Mississauga, which has VERY decent prices on salt water fish.
I know none of these are online options, but still options you may want to investigate.