The attitude of the owners of Aquaknots toward their dive classes is indicative of why they do so well: They just want everybody to join them and get wet. They run their scuba certification classes at cost; $200 buys you the two-week course (two nights a week), including equipment use and two open water dives. "We don't consider the classes as a source of revenue," says co-owner Mario Ginoris, who has been working for the company since he was twelve years old. "We just look at it as a way of making new customers." Instructors at his shop come highly recommended. Ginoris and staff trained Latin crooner Marc Anthony and wife in Tommy Mottola's Miami Beach mansion pool. In addition to carrying a full range of scuba gear, the shop specializes in custom-made spearfishing equipment. Aquaknots is open from 9:00 a.m. to 6:00 p.m. Monday through Saturday.