Mini Scuba Tank 1L Small Diving Tank for Underwater Breathing Portable Lung Air Tank Diving Oxygen Cylinder Kit for Emergency Rescue Boat Cleaning Backup Air Source Pony Bottle S400

I have to say this is one of the best investments I’ve made for underwater exploration. From the moment it arrived, I was impressed by the compact design, professional build quality, and thoughtful engineering. The S400 provides up to 20 minutes of dive time, which is perfect for short underwater adventures, emergency backup, or even quick maintenance dives. It’s lightweight, easy to carry, and surprisingly simple to use. I really appreciate the constant pressure exhaust system it makes breathing smooth and consistent, and the explosion-proof design adds a reassuring layer of safety. The double-layer filtration system is another standout feature. The air feels clean and fresh, which speaks to the quality of this product. I’ve used it for shallow dives around 30 feet, and it performs flawlessly. Also, the fact that it can be disassembled and taken on a plane makes it perfect for travel and spontaneous dive trips. Filling options are super versatile. I’ve refilled it using a standard scuba tank and the 8mm adapter it only took seconds! Knowing I can also use a compressor or hand pump if needed gives me peace of mind. The harness included is comfortable and secure, and the whole setup feels solid and well-made. I wouldn’t hesitate to recommend the SMACO S400 to anyone who wants a reliable, portable diving solution. Whether for fun, emergency, or utility this tank delivers.

Excellent experience. The application works very smoothly and is easy to use, even for people who do not have much experience. I really liked the organization of the tools and how intuitive the whole process is. In addition, it allows projects to be created quickly and efficiently. I certainly recommend it for those looking for a practical and functional option.

Muy bueno el producto en buen estado, me gusto, pero estuve muy preocupado porque no me informaron a que servicio de entrega fue el que recibió en mi País Ecuador, en Amazon salía como entregado pero aun no recibía nada, estuve asustado, pero averiguando veo que lo tenia Servientrega, lo retire 3 días después de la entrega programada.

I bought this mainly as a backup / short underwater use option, not a replacement for full scuba gear — and for that purpose, it works exactly as expected. The build quality feels solid, connections are tight, and it holds pressure well. Very compact and easy to carry, which is a big plus. Air time is obviously limited (as stated), but if you manage your breathing and know what you’re buying, it’s totally fine. Setup was straightforward and everything arrived as described. I tested it carefully and had no leaks or issues. This is not for deep or long dives, but for short underwater tasks, surface dives, or emergency backup, it does the job well. Good value for the price if you use it correctly.

I wish i had purchased this earlier. What a great compact way to travel with diving gear!

The SMACO Mini Scuba Tank (S400) is absolutely incredible! As someone who loves underwater exploration but doesn’t always want to deal with bulky scuba gear, this 1L tank has been a total game-changer. First off, the build quality is outstanding — it feels solid, durable, and very well-designed. It’s easy to use, lightweight, and super portable, making it perfect for quick dives, underwater photography, emergency backups, or just some spontaneous fun exploring reefs and coves. The 20-minute dive time (depending on depth and breathing rate) is more than enough for short dives and underwater tasks. I also love how easy it is to refill with a hand pump, compressor, or larger tank, and the detailed instructions made the whole setup process simple and stress-free. The emergency rescue potential of having this as a pony bottle gives me huge peace of mind whenever I’m doing deeper dives. It’s a serious safety backup that’s compact enough not to get in the way. SMACO really thought of everything with this kit. It’s reliable, lightweight, and surprisingly comfortable to carry underwater. I’ve already recommended it to several of my diving friends. If you’re into diving, snorkeling, or even just want an emergency air supply for boats, this is an incredible investment. Worth every penny!

So I'm very familiar with pressurized gas and obtaining it due to my job (unique kind of welding). Due to liability reasons even though the air used in scuba is the same that comes out of a compressor one might use for a nail gun or sandblaster you need a scuba certification to get it filled. I was always under the assumption that scuba tanks contained some mixture that had supplemental nitrogen and other gasses added to make it safe but it just is compressed air. Looking back I might have just been told that when I asked why pure oxygen wasn't a viable option. This tank comes with a "certification" that says it has been tested but this is no more than a card the manufacturer made themselves and means nothing to a professional shop. So usually when you get any gas filled they need a hydrostatic test and inspection that's valid to make sure the tank is safe and clean enough to be filled with something you will inhale or something that if not properly contained would make as decently sized crater even if this accident happened on asphalt. This is usually a 25$ test at most and happens in a day, most shops with nice owners won't even make you do it as long as they trust the shop that the tank has been filled at before and most tanks that you fill have been around for 60-80 years. Sorry for this off topic fact but oddly enough most people who fill these for work have ran into 3-10 tanks stamped with the symbol commonly used by that the evil guy with the funny mustache. If you ever see a tank with 4 boxes it's because that's the easiest way to cover that up. So even though it's common practice to get a tank that was made before youre grandpa was born, those in the know would trust a tank from back then more than one made this year in China. Even though you can just hook a compressor up to these unless youve been instructed how to use one to breathe in a safe manner going even 10 feet under could be fatal. It's easy to assume that you just need to let the air out and breathe it in but without doing lung exercises and using proper technique there's a sliver of a chance the expansion that happens to your lungs could be fatal. So even if youre built different and can handle stuff like that I found that it was harder to get this filled than it was for me to get a tank of hydrogen when I was 17. I still might try it anyway because I'm also built different 😂 but I'm going to make sure I have a partner with me and talk to an experienced diver beforehand. Hope everyone who reads this gets to live out their fantasy of being a mermaid safely. This is not the best route.

Love this tank! Very portable, and use it in pools to do maintenance and for fun. Looking to take it on vacation soon. I have two different size tanks. The half liter I can stretch to about 12 minutes of air time and with this one liter, I can get it to between 15-20 minutes. I had one issue with the respirator where a piece got stuck closed and I couldn’t breathe, but it’s easy to unscrew and fix. Maintenance is a breeze with additional gaskets/o-rings provided, but haven’t needed them yet. Stay away from the hand pump. It just takes too long, but you’ll get a good workout from it. The half liter took a couple hours to fill with a hand pump. Get a small air compressor to pair with this. This is not for the serious diver unless you’re carrying it for backup air! I am not yet certified in diving but can say this is good for a multitude of tasks. Pool/boat maintenance, shallow diving for spear fishing, exploring shallow ponds and lakes.