The Different Contents of Scuba Tanks You may have seen people at the beach, on TV, and on movies going scuba diving. You may have noticed all the equipments and gadgets attached to the diver that seems so complicated, and perhaps one of the most noticeable about scuba diving is the scuba tank. Scuba tanks are attached at the back of scuba divers and are filled with compressed air and never oxygen. If yes, then do not go for scuba diving, try something else that does not require you to risk your health. Lastly, you should know how to swim. If deep waters really make you panic, then do not pursue scuba diving. Scuba diving is meant for deep waters and not for shallow waters. If you think you cannot swim swiftly, choose other hobby instead of scuba diving. If you want to see sharks, Costa Rica is the place to go. Various species of sharks are seen in this area, including bull sharks. This diving is only reserved for experienced divers with higher certification levels. Costa Rica is also known for its great underwater visibility. If you plan on going scuba diving in Costa Rica, the best time to go diving is on the dry seasons from February to April. Recently, Utila became the home of whale sharks which is the world s largest fish. Don t you worry whale sharks are harmless as you can swim alongside the fish. You can also be lucky to have the chance to swim and dive with dolphins. The best months to see these creatures are from March to May. Getting to Bay Islands is very accessible. You should get your wetsuits and drysuits that can provide the needed thermal insulation and can avoid complications like hypothermia. Always remember that the water is conducting heat 25 times faster than the air from your body. Scuba Sets: There are two kinds of scuba sets and these are open-circuit and closed circuit. The fins allow you to move through the water almost effortlessly and with great efficiency instead of swimming with just using your bare feet and hands. The fins are strapped into your feet because of your powerful leg muscles that you can use for swimming and it provides far more effective propulsion than your arms can provide.