Scuba Diving in Colombia

I currently live in Florida and have over 30 years of diving experience. I have visited Colombia twice and am considering retiring there. Aside from the limited information available through PADI, I haven’t found much detailed information on scuba diving in Colombia. I’m particularly interested in understanding how popular diving is, which cities or regions offer the best dive sites, and the types of diving available (e.g., reefs, wrecks, wall dives). Additionally, I’d like to know how well-developed the local dive infrastructure is—specifically, the availability of equipment servicing and repairs, and whether most dive shops offer Nitrox.