Scuba Gases Explained: Air vs Nitrox vs Trimix (Oxygen, Nitrogen & Helium)

What are you really breathing underwater? In this video, we break down scuba diving gases in simple terms, including oxygen (O₂), nitrogen (N₂), helium (He), enriched air nitrox, and trimix. We explain: - Why regular air isn’t always ideal - What Nitrox actually does (and its limits) - Why technical divers use Trimix - How nitrogen narcosis happens - What oxygen toxicity is - Why helium is used for deep diving - When to choose air vs nitrox vs trimix Whether you're a new Open Water diver, considering your Enriched Air Nitrox certification, or moving into technical diving, understanding breathing gases is critical for safety and performance. In this video Drew answer typical questions you might have! “Why can’t we just breathe 100% oxygen?” “Is Nitrox safer?” “Why is helium so expensive?" “What gas do deep divers use?”