OXSEA
OXSEA mini scuba tank held in the mouth, under the hull of a sailboat at anchor
96% recommend OXSEA · 41 reviews

Refillable mini scuba tank

A small scuba tank you refill yourself, with the hand pump or the 12 V / 220 V compressor. Up to 25 minutes of air for the propeller, the anchor or snorkeling.

See the packsWhich mini scuba tank should I choose?

Our mini scuba tanks

From 0.5 to 2.3 liters and 8 to 25 minutes of air. Each one refills at home, with a pump or a compressor.

Which mini scuba tank should I choose?

Air time depends on your breathing, the depth and the effort.

A mini scuba tank: what is it for?

Under the hull, at anchor, snorkeling or in the pool: each use has its pack. The film shows it all, on board and underwater.

The OXSEA filmMeet the brand2:31
Swimmer under the hull of a sailing boat, one hand on the propeller, OXSEA tank in his mouth

Under the hull

Propeller, anode, hull: a quick check with both hands free.

OX500Plus packs
Swimmer near a sandy bottom freeing an anchor, OXSEA tank in his mouth

At anchor

A fouled anchor or something overboard: 1 L buys you more time on the bottom.

OX1000 packs
Man kneeling on the bottom of a pool, breathing from an OXSEA tank

In the pool

A calm place to learn to breathe underwater. 0.5 L is enough.

OX500 packs

OXSEA customer reviews

They dive with OXSEA

Boaters, families, spearfishers: what they say, in their own words.

96%recommend OXSEA41 reviews
Featured inLe Figaro Nautisme“Oxsea: mini dive tanks within everyone's reach”

  • Great on my boat

    Lightweight, easy-to-carry mini-bottle. Great for my boat!!
    RaphVerified review

  • The hybrid mask is great.

    Already used and always satisfied. Perfect for snorkeling and short dives from the surface to explore or follow a fish. The automatic switch from the OXAIR mask’s snorkel to the tank’s air is amazing.
    AlbanVerified review

  • Works perfectly

    I tested it in our pool, and it works. I filled it with my compressor. You need to get used to the breathing, but it’s a quick learning curve. Runtime is 5 to 8 minutes, depending on the person. Can’t wait to try it in Hawaii next month.
    MaevaVerified review

  • Good experience

    My second mini tank. The first one was defective: a permanent leak, and it ended up on a shelf. The OXSEA one is the complete opposite: six uses in a few months, no leaks, no issues. I fill it with my compressor and get about 8 minutes. I couldn’t be more satisfied. I would buy again.
    JacquesVerified review

  • 3rd purchase

    This is not my first purchase. The whole family has several. Enough said. Perfect for snorkeling and having a backup air supply for quick dives. Easy to use, no issues. My son loves it with the full-face mask. Durable equipment.
    LucasVerified review

  • A great gift

    Given to a marine biologist: she’s delighted. The kit comes complete, ready for the mini-dive.
    FabriceVerified review

  • No issues.

    Easy setup. Fills in about 10 minutes using the compressor. Runtime of 15 to 20 minutes, depending on air flow and your breathing. Easy to use, reliable equipment. Excellent purchase, I recommend it.
    MichelVerified review

  • I recommend

    Quality product, well-built and meets my expectations. Neat finishes, easy to handle, inspires confidence. Very satisfied.
    AnthonyVerified review

How to refill your mini scuba tank

Three ways to fill it with air: by hand, with the 12 V / 220 V compressor on the boat's 12 V battery or a 220 V socket, or in about a minute from a scuba cylinder.

On the teak deck of a sailing boat, a man works the manual pump connected to an OXSEA tankNo electricity

Manual pump

Works anywhere, with no socket or electricity. Just expect some physical effort.

Time
About 20 minutes for 0.5 L
Power
No power socket needed
Tanks
OX500 and OX500Plus
See the packs
Compressor 12 V / 220 V in the cockpit of a sailing boat, connected to an OXSEA tankEffortless

Compressor 12 V / 220 V

The most practical, and effortless: it runs on the boat's 12 V battery or a 220 V socket.

Time
About 12 minutes for 0.5 L, 20 minutes for 1 L, longer for the OX2000
Power
The boat's 12 V battery or a 220 V socket
Tanks
All OXSEA tanks
See the packs
OXSEA DIN transfer station with its hoseThe fastest

The transfer station

Effortless and with no electricity. Already have a scuba cylinder? The station transfers its air into the mini tank.

Time
About 1 minute
Power
A filled scuba cylinder, DIN or yoke fitting
Tanks
All OXSEA tanks
See the packs
Read the refill guideSee the whole shop

Tested by Cabesto

The French marine specialist presented and tested our tanks on video: over 55,000 views.

  • OX500 and hand pump: Joseph's review

    Cabesto · 3:33 · 34K views · In French

  • The OX1000 and the 12 V compressor

    Cabesto · 6:05 · 14K views · In French

  • The OX500Plus pack

    Cabesto · 12:19 · 3.3K views · In French

  • Testing OXSEA tanks

    Cabesto · 4:18 · 2.7K views · In French

  • All about OXSEA tanks

    Cabesto · 10:00 · 1.9K views · In French

  • Cabesto, OXSEA retailer
  • Bigship, OXSEA retailer
  • Uship, OXSEA retailer
  • Nootica, OXSEA retailer
  • Boatspot, OXSEA retailer
  • AZZ Yachting, OXSEA retailer
  • Adnautic, OXSEA retailer
  • Plongée Équilibre, OXSEA retailer
Two hands fitting the head onto an OXSEA tank on a table, the manual and seals beside it

OXSEA School

Video tutorials to use your tank properly, assemble it and fix small issues, product by product and in your language.

  • Get started with your tank and breathe calmly
  • Fit the head, change an O-ring or a filter
  • Fix an issue: leak, air flow, refilling
Go to OXSEA School

What our customers think

Leave a review
  • As a gift
    « My dad loves sailing so I got him this for one of his trips. Not only did he use it to scuba dive in the middle of the ocean, he also used it to fix the engine while in the middle of nowhere. This can make trips better or be a life saver! »
    Sofia K.Verified reviewFebruary 2023
  • Under the hull
    « Have used the system for a year. Carry it on my sailboat. Is great for short trips under the boat. No problem getting refilled at local dive shop. »
    Kenny S.Verified reviewOctober 2022
  • Refilling
    « It was a quality product. Works extremely well. No problems at all. I would recommend purchasing a high pressure electric pump which I did the hand pump works but would only use in a pinch. It takes a long time and effort to fill the tank. With it electric pump only about 6 minutes. I use it for work in my in ground pool and under my boat. Gives you about 15 minutes underwater maybe a bit more. Over all I recommend it. »
    Ruth T.Verified reviewOctober 2022
  • At anchor
    « This tank is great for when I need to do mooring maintenance. I'm able to use this tank and regulator to dive in 10-15' of water for 10-15 minutes without issue. »
    Corey R.Verified reviewOctober 2022
  • In the pool
    « Bought this for my son to use in the pool. He gets about 8 - 9 minutes of air per full tank. That's only if he didn't take any break. He loves it so much that we bought a second tank to extend the time. »
    Maya R.Verified reviewFebruary 2023
  • Refilling
    « I already had a mini bottle of a similar brand! But the mini compressor really changes the experience! »
    Hans W.Verified reviewAugust 2022
  • Customer service
    « Great customer service replaced a faulty compressor quickly with no hassle. I highly recommend. The product I ordered arrived earlier than expected. Everything works and I use it whenever I dive... Just about daily. »
    Donald F.Verified reviewOctober 2022
  • Under the hull
    « Works great for the month I have used it. I use this to clean the hull of my boat in the water so the 10 min or so it lasts is plenty. »
    Bruce D.Verified reviewOctober 2022
  • Spearfishing
    « I am impressed by this small tank. It appears to be very well made. It is easy to assemble. The directions tell you what to do should their be a small air leak, that would be easy to fix. This is a great addition to any divers gear set up. I spearfish, which means I am not always near my fellow divers. »
    Gary L.Verified reviewOctober 2022
  • Under the hull
    « I liked it very much I use it to check on the Neath my boat after I hit a rock »
    Mamie W.Verified reviewOctober 2022
  • Quality
    « This kit has everything you need to get started (except the pump). I received my unit and the quality was better than expected. It comes with cutout foam to fit the tank and accessories in the case. I e-mailed customer service with some questions and they promptly responded. »
    Lisa F.Verified reviewOctober 2022
  • Travel
    « Great bottle for genie springs. Took it on a trip this week and it worked perfect with some fins. Definetly recommend for light diving. »
    Veronica B.Verified reviewOctober 2022

Mini scuba tank: is it dangerous?

It is used close to the surface. The main risk is the ascent: three rules are enough to avoid it.

Read the safety guide

  1. Breathe continuously

    Inhale and exhale normally, never hold your breath.

  2. Never hold your breath while ascending

    As you rise, the air in your lungs expands: breathe out gently all the way up.

  3. Ascend slowly

    Never faster than the small air bubbles rising around you.

Compressed air, not oxygen

Our tanks hold the air you breathe, compressed to high pressure (200 bar for the OX500, OX500Plus and OX1000). People often say “oxygen tank”, but pure oxygen is dangerous when diving: a mini scuba tank is filled with air.

Our guides

Choose well, dive well

All guides

Your questions about mini scuba tanks

Up to 8 minutes with a 0.5 L tank (OX500 and OX500Plus), about 15 minutes with the 1 L OX1000 and 20 to 25 minutes with the 2.3 L OX2000. The real figure depends on your breathing, the depth and the effort.

Three ways: with the manual pump (about 20 minutes for 0.5 L, not compatible with the OX1000), with the 12 V / 220 V compressor (about 12 minutes for 0.5 L, 20 minutes for 1 L, longer for the OX2000) or from a dive cylinder with the DIN or yoke transfer station, in about a minute.

Our tanks are used without diver training, close to the surface. The safety rules still apply: breathe continuously, never hold your breath while ascending, ascend slowly. Our safety guide covers them in detail.

Same 0.5 L volume and same air time. The OX500Plus adds a harness, an external regulator and an external gauge: you wear it on your back, hands free, or in the mouth. Both take the OXAIR mask.

Yes: tank completely empty, head open or removed, and declared at check-in. Check your airline's policy before you leave.

Worldwide. Tracked delivery is free on every pack to mainland France, Monaco, the European Union, the United Kingdom, Switzerland, Norway, Australia and the United States; elsewhere, the cost and delivery time appear in the cart as soon as you choose your country. 30-day returns, 24-month warranty.

Tanks and refill systems are guaranteed for 24 months. You have 30 days to change your mind: return conditions are detailed on the Shipping and returns page.

Yes, with Klarna, in the countries where it is offered at checkout (France, Belgium, Germany, Spain, Italy, the Netherlands, Austria, Portugal, Ireland, Finland, Greece). Bank cards and Apple Pay are accepted everywhere.
See all questions
OXSEA tank standing on a teak deck, mask and fins beside it, the sea behind

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