If you can get air fills for $5 you are paying 1990's prices, and that was "give away then" Nitrox cost much more to produce plus raises the shop's liability insurance and sometimes government inspections. Many areas that do not have a high local demand do not sell Nitrox.
For most the reason to get certified for Nitrox is to use it on vacation, Diving with Nitrox is no different than air except for a MOD that you shouldn't exceed this is easy to practice on air.
I have also seen resorts charge a premium of $15-20 a tank over included air without complaints
For most the reason to get certified for Nitrox is to use it on vacation, Diving with Nitrox is no different than air except for a MOD that you shouldn't exceed this is easy to practice on air.
I have also seen resorts charge a premium of $15-20 a tank over included air without complaints