The South East coast of Oahu has some great drift dives. The most requested dive is the famous Corsair where the visibility is always 100 ft+. Usually the second dive of the day is a drift on a wall or a shallow reef area. The amazing thing about diving the South East is that the dive sites are located between two visible volcanos in an area called Maunalua Bay. One of the best dives is on outside wall of Koko Crater, where you can easily see many layers of volcanic eruption underwater.
Hawaii Eco Divers will make sure you always dive the best sites possible during your trip in Hawaii.