My wife is originating from Camiguin and I have done a lot of dives in Camiguin over the years. I have done all my dives through Camiguin Action Geckos, which is one of the operators. As mentioned before, Johny's is another one which I believe is equally good. Johny's does offer Nitrox while Camiguin Action Geckos does not. For most dive sites, Nitrox is not needed, except maybe for Old Volcano and Burias Shoal. At Old Volcano, you can find Pygmee Sea Horses at around 30-35m so Nitrox is a nice to have if you want to stick around a little bit longer, but certainly not mandatory as there is plenty of stuff to see at shallower depths. Burias Shoal is the only site where you could really use it as it is shoal at depth, so it is a square pattern dive.
Camiguin Action has its own resort while Johny's operates out of 4 different resorts. Apart from those 2 operators, there is also another dive resort on the other side of the island (around Sagay) or you could also stay at Duka Bay or Mantigale at the mainland (close to Balingoan). The disadvantage of those 2 is that the cost per dive is higher due to the much longer trips to be taken via speedboat, if you dive at one of the Camiguin dive spots. In addition, if you take the effort to go to Camiguin, you might as well stay on the Island to experience the Activities on land such as: Ardent Hot Springs, the different waterfalls, Soda Pool, Santo Nino pool, eat crab at the Lagoon, climb Hibok-Hibok,...
Dive sites that I would really recommend from my personal experience are:
- Old Volcano (big volcanic blocks, underwater canyons, Pygmee Sea Horses)
- Mantigue Island (very small Island off Camiguin, National Park, Turtles, schools of fish). Great to do this as a day trip. Camiguin Action offers this as a daytrip with 2 or 3 dives and BBQ on the beach at lunch time.
- Burias Shoal - probably the most difficult site - plenty of current - possibility to see big fish such as Tuna. This site is good to combine with Mantigue due to its location
- For Night dive: Nudibranch City (located at Tangub Bay)
Camiguin surely does not have the best dive sites of the Philippines, however what I really like is the variety of sites (difficulty levels, depths, macro, big fish, corals). It will offer a great choice for everyone, no matter of the level of experience or interest.
If you have any further specific questions, just let me know.
Enjoy Camiguin !