Just got back from Capt Dons but also visited Buddy. Take your adapters. The tanks included in the dive packages are standard AL 80s with yoke valves. There are a couple tech shops on Bonaire that have single AL 100s with DIN valves (TDS at Capt Dons' has two). We rented those for a day when we did a special shore dive and wanted the extra bottom time. For most dives, the 80s are just fine and its not worth paying the extra.