Enriched air — nitrox for short — is the single easiest upgrade to your scuba diving, and it is one of the most popular add-ons divers pick up here in Boracay. Breathe a tank with a little less nitrogen in it and you can stay down longer and surface sooner between dives, which on a multi-dive Boracay day often means an extra dive or simply more time with the turtles. Here is what enriched air (nitrox) diving in Boracay actually involves, who can learn it and why so many of our certified divers end up breathing nitrox on every dive.
What is enriched air (nitrox)?
The air you normally breathe is about 21% oxygen and 79% nitrogen. Enriched air — also called nitrox or EANx — simply has more oxygen and less nitrogen than that. The two blends we fill most often are EANx 32 (32% oxygen) and EANx 36 (36% oxygen).
Why does less nitrogen matter? Because it is the nitrogen your body absorbs underwater that limits how long you can safely stay down before you need to make a slow, staged ascent. Breathe less of it and your no-decompression limits stretch — you get longer dives and shorter surface intervals without changing a thing about how you dive. The reef looks exactly the same; your tank is the only difference.
Why nitrox is worth it in Boracay
Boracay is a multi-dive destination. Most certified divers here do two, three or four dives in a day, often back-to-back on the same boat trip. That is exactly where enriched air pays off:
- Longer bottom time — on a reef at 18–20 metres, EANx 32 can give you noticeably more no-stop time than regular air, so you are not cutting the dive short just as the turtles show up.
- Shorter surface intervals — your body offgasses nitrogen faster between dives, so you spend less time sitting on the boat and more time in the water.
- An extra dive in the day — stack those two benefits across a three- or four-dive day and nitrox can be the difference between stopping early and getting one more dive in.
- Feeling fresher — many divers say they finish a nitrox day feeling less tired. That is anecdotal rather than guaranteed, but it is one of the most common reasons repeat divers switch.
Those gains are biggest on our deeper, longer sites — the walls at Yapak and Punta Bunga, or the Tri-Bird plane and Camia II wrecks — where bottom time is the scarce resource. You can see the full spread on our Boracay dive sites map.
Is nitrox safer than regular air?
It is an honest question, and the honest answer is: nitrox is not a free pass to go deeper or stay down with no limits. What it does is give you a wider margin against nitrogen at normal recreational depths. It does not let you dive deeper — in fact the extra oxygen gives nitrox a shallower maximum operating depth than air, so a nitrox dive is a bit more conservative, not less.
The one new rule nitrox adds is oxygen: because you are breathing more of it, every nitrox tank has a maximum depth you must stay above, and you analyse the gas yourself before every dive to confirm the blend and set your limit. That analysing step is the heart of the course, and once you have done it a few times it takes about a minute. Used within its limits — which is what the training teaches — enriched air is a well-understood, mainstream part of recreational diving.
The PADI Enriched Air course in Boracay
The PADI Enriched Air (Nitrox) course is the most popular PADI specialty in the world, and one of the quickest to earn — most divers are certified in half a day. It is mostly knowledge: how enriched air works, how to analyse a tank, how to fill out an enriched air log and how to set your dive computer for nitrox.
You do a short e-learning module (about two to four hours) before you arrive, then we handle the practical side at the shop. You choose how you want to finish:
- Nitrox Diver — complete the theory and practical, then put nitrox into practice on one guided dive so you feel the difference in the water.
- Dry Nitrox — complete the theory and the dry practical only, with no dive. You earn the exact same PADI Enriched Air Diver certification.
Both options give you the identical card — the only difference is whether you want a dive included. Pick the dive version if you would like to feel the extra bottom time first-hand; the dry version if you are short on time or saving the water days for something else. One thing to know up front: the dive cannot be added to Dry Nitrox afterwards, so choose before you book.
Gear, tanks, the dive computer and all learning materials are included. Prices change with the season and our online-and-cash discount, so rather than quote a figure that drifts, we keep the current rate on the course page — or just message us and we will confirm.
Who can take the Nitrox course?
You need to be a certified diver to enrol: a PADI Open Water diver (or an equivalent qualifying certification from another agency) aged 12 or older. No prior nitrox experience is needed — that is what the course is for. If you are not yet certified, the path is to get your Open Water certification first, then add nitrox whenever you are ready; it is a perfect second step.
Where nitrox fits in your diving
Enriched air is the specialty that makes almost every other one better, because more bottom time helps on any longer or deeper dive. It pairs especially well with two of our other specialties: Deep Diver, where the extra no-stop time is genuinely useful at 30–40 metres, and the Wreck Diver course on the Tri-Bird and Camia II, where you want every minute you can get to explore. It also counts toward the Master Scuba Diver rating alongside your Advanced Open Water and Rescue training.
Want the bigger picture of what we run? Our guide to PADI specialties in Boracay walks through all of them and which to take in what order.
Frequently asked questions
How long does the PADI Enriched Air (Nitrox) course take in Boracay?
Most divers finish in about half a day. You do a short e-learning module (roughly two to four hours) before you arrive, then complete the practical — and one dive if you choose the dive option — with us at the shop.
Do I need to be a certified diver to take the Nitrox course?
Yes. You need a PADI Open Water certification (or a qualifying equivalent from another agency) and to be at least 12 years old. No previous nitrox experience is required.
Does nitrox let me dive deeper?
No — the opposite, if anything. Nitrox has a shallower maximum operating depth than regular air because of the extra oxygen. Its benefit is longer no-decompression limits and shorter surface intervals at normal recreational depths, not more depth.
Is enriched air diving safe?
Used within its limits, yes. The course teaches you to analyse each tank, confirm the blend and stay above the tank's maximum depth. Follow those rules — which become second nature quickly — and nitrox is a mainstream, well-understood part of recreational diving.
Can I do the course without a dive?
Yes. The Dry Nitrox option covers the theory and dry practical with no dive and earns the identical PADI Enriched Air Diver certification. Choose the dive version instead if you would like to feel the extra bottom time underwater — the dive cannot be added afterwards.
Is nitrox worth it for diving in Boracay?
For most certified divers doing more than one dive a day, yes. Boracay is a multi-dive destination, so the longer bottom times and shorter surface intervals add up fast — often an extra dive in the day or simply more time on the reef.