Check out Aquapets. It's on the south side of Steeles, just west of Midland. I think the street is called Siverstar or Silverspray. It's beside a lobster/sea food restaurant, behind a Scotiabank. I was there today but they had none, expecting some blackworms tonight apparently. They have a review on this site somewhere, maybe even a phone#. It's a good idea to call ahead, they don't always have them on hand. Cash only, I've heard he negotiates but I've never bought anything worth negotiating for.