SMACO 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 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 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.

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!

Got the tank, tried it in the pool. Here is a quick review. It worked well in the pool, the regulator and tank functioned as it should. However, there are a few things that need to take notes of. First of all, it does NOT give you 20 minutes of air, not even close to. It's a 1 Liter tank, which is about 1/10th the size of a regular 80cf diving tank, so it basically gives you 1/10th of whatever your breathing time is with a regular diving tank. I can usually breath 60 min with a regular tank in a dive, so no surprisingly, this tank gave me about 6 minute +/- of breathing time. Also, if you do not want to invest in an electric pump, do NOT buy it. I used my PCP electric pump to fill it up and it took almost 20 minutes. Simply can not imagine pumping it with a hand pump, it may take you whole day to fill it up. And despite what some of these tank sellers claim in their pictures, this is NOT for beginners. Do not try to play with this out in the wild if you are not a certified and experienced diver. I'd only try to use it in very shallow water like no more than 10-12 feet deep, where I can make to surface right away in any emergency.

This compact scuba tank is perfect for quick underwater exploration! It’s lightweight, easy to carry, and great for short dives or emergencies. I love how simple it is to refill and use. The build quality feels solid and reliable. A great tool for adventurous swimmers and divers!

This tank is amazing for a beginner snorkeling tank. So far with practice I can get 17.5 minutes of air. It’s so easy to set up and fills at home in 20 minutes. We bought a portable compressor so we can fill it at the beach from our car. Best purchase so far this year! Great quality tank and rebreather. There is no better quality for the price.

I work in the film industry in the Stunts department and purchased this product for a specific Stunt where I had to use the equipment in a confined space and it worked exactly as advertised. I am very happy with the product.

Je suis un plongeur certifié et j'ai acheté le produit pour des plongées en eau peu profonde et le produit m'a vraiment impressionné. J'ai réussi à obtenir une autonomie de 25 minutes à moins de 20 pieds de profondeur avec un remplissage à 300 bars (45 minutes pour remplir avec un compresseur de 4500 PSI) ! Je vais donc acheter une 2e kit afin de plonger avec 2 bouteilles. Il peut également servir de bouteille de sécurité. La courroie transversale par contre qui maintient la bouteille en place est moins intéressante et lorsque la bouteille est en place, le cadran de pression est plus difficile à lire. D'un point de vu prix/qualité, je recommande le produit !

Product is not suitable for Canada …professional scuba divers shops refuse to fill up the tanks..

For my use these pony tanks work. Underwater photography. I still have not filled them to the psi that is suppose to be the max. I hve trust issues when it involves a explosion in my face. I fill using diving tanks and a jumper hose/regulator. Not the hand pump. If a hand pump is your goto you will be disappointed. The air Gauge is crap. I would recommend the manufacturer start using higher quality gauges as sometimes they stick or you run out of air and the gauge has just hit the red mark, no reserve. NOT FOR CHILDREN AND NOT FOR THE INEXPERIANCED unless your only going a few meters down