Hello! I love to swim and I would love to be able to stay underwater for 3+ minutes.Yes i kmow i know thats what scuba diving is but i mean something around $500 dollars.If theres a all inclusive Scuba package on the market for that ill take a look if you post a link.Also I heard mixed things about spare air is it reliable can i swim in my pool with it if i asend slowly? Any other devices that can do this besides scuba and snorkeling ?