Adventure · Scuba Diving AquaSub Scuba Diving Centre Richmond Hill, Toronto, Ontario At AquaSub Scuba Diving Centre, we make dive training FUN and EXCITING! With over 20 years of sport, military and commercial diving, we are the experts. Courses starting every week. Beginner to Instructor level training. Exotic and local trips every month. Great deals on a variety of equipment, as well as servicing and rentals. AquaSub Scuba Diving Centre is located in Richmond Hill, Ontario.