How Much Does it Cost to Fill a Scuba Tank? (Explained!)

How Much Does it Cost to Fill a Scuba Tank?

Ah, scuba diving – the thrill of exploring the underwater world, the serenity of floating weightlessly, and the sudden panic of realising you’re running low on air. Yes, scuba diving requires a lot of gear, and one of the most essential pieces is the scuba tank, which holds the compressed air that allows you to breathe underwater. But how much does it cost to fill a scuba tank, and what factors can affect the price?

The cost of filling a scuba tank varies depending on factors like tank size, air pressure, and the type of air you’re filling it with. Generally, the price range for refilling a scuba tank lies between $5 and $35, making the activity quite affordable. Of course, it’s essential to maintain your equipment properly and adhere to safety guidelines when scuba diving.

While exploring diving destinations, you’ll come across various dive shops offering different prices for tank refills. It’s worth shopping around to find the most affordable option, as these small savings can accumulate over time.

As we dive deeper into this article, we’ll explore other aspects of refilling scuba tanks and more, so keep reading for a comprehensive guide on this essential aspect of your scuba diving experience.

If you are short on time:

Type of GasPrice per Cubic FootPrice per Tank (80 cubic feet)
Air$0.22 – $0.30$17.60 – $24.00
Nitrox$0.30 – $0.50$24.00 – $40.00
Trimix$1.00 – $2.00$80.00 – $160.00
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Types of Scuba Tanks

As a scuba diver, you probably know that the right scuba tank can make your diving experience more enjoyable. So, let’s talk about the two main types of scuba tanks: steel tanks and aluminium tanks. Which one is best for you depends on your specific needs and preferences, but both have their own advantages.

Steel Tanks

Ah, the trusty steel tank! These tanks are often the top choice for technical divers and those who appreciate the increased durability. Steel tanks generally have a higher working pressure, which means more air for you to breathe during those deep dives.

The weight of a steel tank is also beneficial, as it reduces the need for extra weight and allows for a better overall buoyancy control. So, how about a few interesting facts?

Did you know that steel tanks can rust internally, forming what’s called a ‘rusticle’? Don’t worry, though! This is usually caused by improper care. Keep your tank dry and routinely check for rusticles to ensure that your steel cylinder remains in tip-top shape.

However, steel tanks can be a bit heavier, which might discourage some divers. But if you’re all about durability, performance, and even a bit of history, considering steel tanks is definitely a smart move.

Aluminium Tanks

Welcome to the lighter side of scuba diving with aluminium tanks! These tanks are typically favoured by recreational divers who enjoy their comfort and lighter weight, perfect for those fun diving adventures. The aluminium tank is also corrosion-resistant, unlike its steel counterpart. Although aluminium tanks have lower working pressure compared to steel, they still provide plenty of air for most recreational dives.

Here’s an intriguing fact: have you ever heard of aluminium tanks referred to as “beer cans”? That’s because, historically, some aluminium scuba cylinders were made from the same aluminium alloy used for making drink cans!

A downside to aluminium cylinders is their buoyancy change as you consume the air, which might require some adjustments during your dive. However, the ease of handling and maintenance of an aluminium tank is hard to beat.

Now that you know a bit more about the different types of scuba tanks, your next mission is to choose the one that works best for you. Whichever you decide, happy bubbles and fantastic diving await! In our next section, we’ll talk about the cost of filling your chosen scuba tank and how to maintain it properly.

Filling Scuba Tanks

Filling Scuba Tanks

As a diving enthusiast, you’re probably eager to explore the underwater world. One essential element to ensure a safe and enjoyable experience is a properly filled scuba tank.

Let’s cover the various aspects of filling a scuba tank, including air pressure, tank inspection, the filling process, and the costs involved.

Air Pressure

When it comes to filling your scuba tank, pressure is a crucial factor. Most recreational tanks are filled to 3000 PSI (pounds per square inch). However, you may notice that your tank loses pressure after filling, dropping to about 2700 PSI. This occurs because the filling process generates heat, and as the tank cools down, it loses some pressure. Fear not! After it cools off, you can top off the tank back to 3000 PSI.

Tank Inspection

Before filling your scuba tank, it’s essential to ensure the tank is in good condition. This is where a tank inspection comes into play. Dive shops will usually perform visual inspections and pressure testing.

Visual inspections involve checking for signs of rust, external damage, or anything that could compromise the tank’s performance. Pressure testing evaluates the tank’s ability to withstand high pressures safely. It’s good practice to have your tanks inspected regularly to ensure you have a safe and reliable dive!

Filling Process

You may be wondering how the filling process works. The primary method for filling a scuba tank involves using an air compressor, which compresses filtered and moisture-free air before pumping it into the tank. Some dive shops may utilise dedicated fill stations with specialised equipment to ensure the air quality meets the necessary standards for safe diving.

Cost of Filling

How much does it cost to fill a tank, you ask? The cost of filling a scuba tank can vary depending on several factors. However, for most recreational divers, it typically ranges from $10 to $20. Prices may differ based on the size of the tank or the types of gases used, such as Nitrox, which requires a higher level of filtration. Don’t be shy to shop around and compare prices among dive shops – who knows, you might even stumble upon a fantastic deal!

As you’ve learned, properly filling and maintaining your scuba gear is an essential aspect of a safe and enjoyable dive.

Breathing Gases

Breathing Gases

When it comes to filling a scuba tank, the type of breathing gas mix you choose plays a crucial role in not only the cost but also your diving experience. In this section, we’ll explore different breathing gas options, including Standard Air Mix, Nitrox Mix, Helium, and Trimix. Grab your fins and let’s dive in!

Standard Air Mix

The most common and cost-effective option for filling your scuba tank is the Standard Air Mix. It contains around 79% nitrogen and 21% oxygen, with trace amounts of other gases.

Expect to pay between $10 to $20 per fill for this mix. Although a great option for recreational divers, using standard air can increase the risk of decompression sickness and nitrogen narcosis at deeper depths.

Did you know that the air you breathe on land has the same composition as a Standard Air Mix? Talk about consistency!

Nitrox Mix

Are you seeking a little more oomph in your dive? Consider upgrading to a Nitrox Mix, also known as Enriched Air. Nitrox contains a higher percentage of oxygen (typically between 22% and 40%), which reduces the percentage of nitrogen. This results in extended bottom times and a lesser chance of decompression sickness or nitrogen narcosis. While Nitrox Mix is a wonderful choice for most divers, it may cost you more than Standard Air due to the additional oxygen.

However, your underwater adventures will be worth it! Curious about the exact percentage of oxygen in your mix? Don’t worry – most dive centres have an oxygen analyser you can use to check the mix before you dive.

Helium and Trimix

If you’re an adventurous soul who loves deep diving, you might want to explore the realms of Helium and Trimix gas blends. Trimix comprises nitrogen and oxygen like the other mixes but also includes a proportion of helium.

Why helium, you ask? Well, it helps counteract the effects of nitrogen narcosis and reduces the density of your breathing gas – making it easier to breathe as you descend to greater depths.

However, increased efficiency often comes at an elevated cost, and Helium and Trimix are no exception! They tend to be significantly more expensive than Standard Air or Nitrox due to the additional gases involved.

But when you’re flirting with deep-sea creatures and exploring the depths of the ocean, the unparalleled diving experience might just be worth the extra expense.

Scuba Air Tank Sizing Considerations

Scuba Air Tank Sizing Considerations

When it comes to filling a scuba tank, understanding the different sizes and their implications is crucial. In this section, we will explore the 100 CU FT, 232 BAR, 80 CU FT, 207 BAR (S80), and 25 CU FT, 232 BAR (Emergency Cylinder) scuba air tanks.

100 CU FT, 232 BAR

A 100 CU FT tank provides an impressive mix of high capacity and reasonable weight. Able to hold 232 bars of pressure, this tank size is perfect for those extended dives that you might have in the pipeline.

So, if you’ve got a particularly intriguing underwater site on your bucket list or if you simply enjoy long dives, this one’s for you. Did you know that larger tanks often require a bit more effort to fill? This is due to the larger volume of air required.

80 CU FT, 207 BAR (S80)

The 80 CU FT, 207 BAR (S80) tank is a classic choice for many divers. To give you a sense of scale, this tank can hold 207 bars. That’s a substantial amount, about 80% of the capacity of the 100 CU FT, 232 BAR tank.

The S80 is popular because it’s a great all-rounder. It’s a perfect fit for beginners or experienced divers alike, and it’s often considered the “Goldilocks” tank size. The question is, will you be getting your hands on this popular choice?

25 CU FT, 232 BAR (Emergency Cylinder)

It’s always a wise idea to have a backup air source during a dive, right? Well, that’s exactly what the 25 CU FT, 232 BAR (Emergency Cylinder) is for! As its name suggests, this smaller tank is essentially a safety net; if your main tank runs out or malfunctions, this little gem steps in, holding 232 bars of pressure. Talk about a lifesaver! Dive shops usually fill these tanks separately, so don’t be surprised if you’re asked to pay a separate fee for this service.

Safety Considerations

Safety Considerations

When it comes to filling your scuba tank, there are certain safety considerations you should be aware of. In this section, we’ll discuss visual inspections, hydrostatic testing, air quality testing, and diver training, keeping your diving experience safe and enjoyable.

Visual Inspections

To ensure the integrity of your scuba tank, it’s important to have it visually inspected at least once a year. This process involves a certified technician checking the tank for any signs of corrosion, damage, or contaminants.

By performing regular visual inspections, you can catch potential issues early and keep your tank in top shape. Remember, a clean and well-maintained tank is key to a safe diving experience.

Hydrostatic Testing

In addition to visual inspections, your scuba tank should undergo hydrostatic testing every five years. This test involves subjecting the tank to immense pressure, which helps determine its structural integrity.

A scuba tank that fails hydrostatic testing could be at risk of rupturing, causing significant harm to you and those around you. Staying on top of your tank’s testing schedule is essential for your safety and peace of mind.

Air Quality Testing

Another crucial aspect of scuba tank safety is the quality of the air used to fill it. Contaminants in the air can be harmful when breathed in at depth, potentially leading to decompression sickness or other health issues.

Dive shops use filters to remove impurities from the compressed air, but it’s a good idea to ask about their air quality testing procedures before filling up. After all, clean, breathable air is essential for a smooth and enjoyable diving experience.

Diver Training

Of course, no amount of tank maintenance can replace proper diver training. Obtaining diving certificates, attending refresher courses, and staying informed on new safety protocols will help you feel confident and well-prepared underwater.

A well-rounded diving education is your best defence against potential hazards, so don’t skimp on the learning.

To wrap it all up, paying attention to the safety aspects of filling your scuba tank, including visual inspections, hydrostatic testing, air quality testing, and proper diver training, will ensure you’re well-equipped for a diving adventure.

The more knowledgeable and prepared you are, the more fun you’ll have exploring the deep blue sea. So go ahead and dive right in!

Diving Applications

Diving Applications

Scuba diving is a fascinating activity with various applications, ranging from recreational diving to technical diving, military operations, and underwater archaeology. In this section, we’ll explore these diverse applications and discover how each of them relies on different scuba tank filling requirements.

Recreational Diving

Recreational diving is probably the most common and well-known form of scuba diving. It allows you to explore wonderful underwater environments and dive locations at depths of up to 40 metres.

As a recreational diver, filling your scuba tank typically involves using compressed air, with an average cost ranging from $5 to $35 depending on tank size and air pressure. Remember to check the maximum working pressure on your tank, which is usually around 3,000 psi for standard recreational tanks.

Technical Diving

Technical diving is for the more experienced divers amongst us, venturing beyond the recreational diving limits, often exploring depths of over 40 metres.

This type of diving requires a more technical approach to filling your scuba tanks, such as using special gas blends like Nitrox or Trimix. These blends cost more to fill, with prices sometimes reaching nearly $200 for a large trimix blend.


Scuba diving also plays a crucial role in military operations such as underwater surveillance, inspections, and recovery missions. Military divers typically use specialised rebreather systems, which recycle the exhaled gas, allowing for extended dive times and only requiring pure oxygen cylinders. Costs for these systems can vary greatly depending on military specifications and operational requirements.


Underwater archaeology is a fascinating application of scuba diving, unlocking the mysteries of ancient civilizations and submerged historical sites.

Archaeologists often use both recreational and technical diving techniques to access these treasures. Depending on the depth and complexity of a dive, they might require different gas blends and multiple scuba tanks, which can increase costs.

As you continue your diving adventures, remember that each application has its own unique scuba tank filling requirements and associated costs.

Final Thoughts

Final Thoughts

In conclusion, filling a scuba tank can be a significant expense for scuba divers, but it’s an essential part of the sport and should not be overlooked. By understanding the factors that can affect the cost of filling a scuba tank, such as the type of air, the location, and the fees charged by dive shops and fill stations, divers can plan their budgets accordingly and avoid any surprises.

It’s also important to remember that the cost of filling a scuba tank should not be the only factor to consider when planning a dive. Safety, quality, and accessibility of air should always be top priorities, and divers should never compromise on these aspects to save a few dollars.

Lastly, scuba diving is a wonderful and rewarding activity that can bring us closer to nature and ourselves. While the cost of filling a scuba tank may seem daunting at times, the experiences and memories that scuba diving can provide are priceless.

So, let’s continue to explore the underwater world, respect and protect it, and enjoy every breath of air we take. Happy diving!

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Lisa Hayden-Matthews

An avid Skier, bike rider, triathlon enthusiast, amateurish beach volleyball player and nature lover who has never lost a dare! I manage the overall Editorial section for the magazine here and occasionally chip in with my own nature photographs, when required.
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