Scuba tanks are often filled with air, similar to what we breathe on the surface, that are compressed to about 250 bar or 3000 pounds per square inch. Sometimes, scuba tanks are filled with special mixtures for special diving. You can also have a tank filled with NITROX that will enable a diver to have longer bottom time but shallower dives. Adjustable strap fins have foot pockets that are open at the back and are equipped with adjustable heel straps while the full foot fins have foot pockets encloses the heel. Most scuba divers prefer adjustable fins because then can be worn with wet suit boots and most high powered models of fins are available in adjustable strap fins. Thailand is offering the best scuba diving resorts that have special instructors for people having great passion for scuba diving. The instructors are there to give guidance to the divers and enhance their skills more. Most of the good resorts found in Thailand are also rendering certification program upon completion of the training that are also given to vacationers who are interested to go for scuba diving classes. Aruba is certainly the destination for you if you seek a unique dive site filled with exotic marine animals. If you plan on going on a diving vacation in Aruba, you should prepare all your necessary diving gears the day before you depart for the trip. Make a checklist in order to make sure that you will never leave any essential things behind. Costa Rica dive resorts also offer first-class dive boats that you, as a diver, will be comfortable while traveling to the dive site. Costa Rica is relatively new in the diving community and there are lots of potential dive sites that you can explore. Exploration dives are very popular in Costa Rica. The best thing to do is for you to make a twist in your activities. Getting a chance to witness the wonders of the world is a rare privilege. How much more if you will spend your vacation underwater? You just can t imagine the enchanting beauty of the coral reefs and the aquatic creatures gliding in the sea.