The Atomic M1 Octo – Yellow 36 is an octopus regulator – your backup breathing source. Bright and easy to spot in an emergency, it’s engineered to perform reliably when it matters most. Every diver should have one, and this is a solid choice for diving at Tioman’s diverse coral gardens.
Technical Specifications
| Specification | Details |
| Brand | Atomic |
| Product | M1 Octo – Yellow 36 |
| Stage | Octopus |
| Type | Piston |
| Material | Chrome / Brass |
| Connection | DIN / Yoke |
| Best For | Recreational diving |
Key Features
- Bright yellow housing: Instantly visible in an emergency – no searching around.
- Balanced design: Breathes as smoothly as your primary – when it matters most, it performs.
- Lightweight: Doesn’t add drag or clutter to your rig.
- Standard freeflow: Works reliably even if the diver is panicking.
Suited for Malaysian Dive Sites
The Atomic M1 Octo – Yellow 36 is built to perform across Malaysia’s best underwater destinations. Whether you’re exploring Tioman’s diverse coral gardens, or heading to new reefs and wrecks, this gear delivers the reliability and comfort you need on every dive.
Care & Maintenance
- Rinse and purge after every dive – same as your primary.
- Keep it secured and visible on your rig – don’t let it drag.
- Service it on the same schedule as your primary regulator.
- Replace the mouthpiece when it wears.
Final Verdict
You hope you never need it. But when you do, you need it to work perfectly. The Atomic M1 Octo – Yellow 36 is a reliable backup that earns its place on every rig.



Aaron Lim –
Used the M1 Octo – Yellow 36 for three dives now and really impressed by how comfortably it breathes, even at depth. The yellow hose is super visible, which makes sharing air easy. Only thing is, the mouthpiece feels a bit large for my jaw after a longer dive.
Imran Hanafiah –
Thank you for your feedback, Aaron. We’re glad to hear you’re enjoying the performance and visibility of the M1 Octo. If the mouthpiece feels large, you may want to explore our selection of alternate mouthpieces for a more customized fit—just let us know if you need assistance.
Siti Khalid –
Is the M1 Octo – Yellow 36 compatible with enriched air nitrox up to 80% O2? Planning some technical dives soon.
Imran Hanafiah –
Hi Siti, yes, the Atomic M1 Octo – Yellow 36 is EAN-compatible and rated for use with nitrox mixes up to 80% oxygen, making it suitable for your planned technical dives.
Rachel Ong –
Just got this as a backup regulator and love how lightweight it is. No jaw fatigue at all, even after an hour underwater. Haven’t tried it in cold water yet, but so far very happy with the build quality.
[email protected] –
Thank you, Rachel, for your review! We’re pleased to know the M1 Octo’s lightweight design and comfort have met your expectations. Don’t hesitate to reach out if you have questions when you take it on colder dives.