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Expert Advice

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Find Dive Tanks and Scuba Tank ...

Let Divers Direct help you choose your scuba tank from our selection of dive tanks with a variety of sizes and materials for you to choose from.

A SCUBA tank allows divers to breath underwater with some additional equipment.

Scuba cylinders are made from either Steel or Aluminum materials. A Steel scuba tank is offered as a High Pressure tank or Low Pressure scuba tank. High Pressure steel scuba tanks allow up to 3442 psi to be pumped into a cylinder while low pressure steel scuba tanks can fill up to 2640 psi. Steel dive tanks weigh more due to the material in which it was made requiring less weight to be used in a weight belt. This is a benefit for some scuba divers. Divers Direct carries 4 sizes in Blue Steel scuba tanks. Our sizes are 80 cubic foot, 100 cubic foot, 117 cubic foot, and a 133 cubic foot cylinder. The 117 or 133 cubic foot steel cylinder would be recommended for divers who are in the technical range and do very deep diving. If you are a recreational diver these tanks may be too heavy. An 100 cubic foot cylinder is the most often purchased steel cylinder.  It is the same physical size as the aluminum 80 but holds more air. 

There are many sizes in a scuba tank but you'll find standards throughout the industry.

Standard psi in an aluminum scuba cylinder is 3000. There are 2 different 80 cubic foot dive tanks that we carry. There is the regular 80 cubic foot cylinder (sku 475) which holds the standard 3000 psi. The other 80 cubic foot cylinder is a Neutrally Buoyant Tank which allows for an extra 300 psi for a total of 3300 psi in this cylinder. As you guessed, this tanks is also neutrally buoyant in the water. 80 cubic foot tanks are the most popular among recreational divers. They are the most commonly found tanks on the water. Divers Direct also carries the 40 cu ft, 50 cu ft, 63 cu ft, and a 100 cu ft. There is a size for everyone.

If you are technical diver or if you are just wanting that extra piece of mind, then a pony bottle is for you. Pony tanks are small cylinders that are used primarily as a back-up air source. The main difference between a pony tanks and a spare air source is the air capacity. You will be able to get more air out of a pony tanks. They will allow you to make your safety stops as necessary without running out of air. Pony tanks come in 6 cu ft, 13 cu ft, 19 cu ft, and 30 cu ft sizes.

When purchasing tanks, evaluate how quickly you go through your air in your cylinder, the frequency of diving you are planning to do and the type of diving you will be doing. There is no "one-size-fits-all" cylinder out there in the market. If you are in doubt and need assistance our trained sales staff is here to help you. Please contact our professional sales staff toll free 1-800-DIVE-USA or through e-mail at Divers Direct Contact Page.

Following the steps listed below would ensure a well maintenance cylinder.


  • Remember to keep at least 200 - 300 psi in your cylinder at all times.
  • Never drain your tank completely. Draining your cylinder will allow moisture to enter allowing rust and corrosion to take place as well as creating pitting in the tank which is grounds for condemning it.
  • Store your scuba tank in a cool dry place.
  • Avoid rough handling that will cause dents, gouges or nicks in the tanks.
  • This will also invite corrosion of the metal and can weaken the cylinder.
  • It is important to get a Visual Inspection (also known as a VIP) on your cylinder at least once a year by a certified VIP technician.
  • Every 5 years your cylinder will require a hydro-static testing.

Divers Direct has many certified scuba tanks technicians on hand. Ask them about what processes your cylinder goes through during a hydro-static test and a visual inspection. The more you know about your gear the better.

Please note: most scuba cylinders that Divers Direct carry in their stores are already nitrox compatible. Due to shipping restrictions all scuba cylinders shipped via air will not include the air fill. All cylinders being shipped via ground transportation will only have 500 psi in order to keep the Visual Inspection current. If you are planning on purchasing in one of our stores please bring your certification card. All purchases in stores will require your certification card up front before a visual inspection or a fill will be done. No exceptions.

Scuba cylinder selection can be summed up as follows: pick a cylinder that is light enough for you to carry and large enough to supply air for an ascent and safety stop from your planned diving depth.

For shallow reef diving, you may require only a Catalina Aluminum Cylinder 63 cu ft or Catalina Aluminum Cylinder 50 cu ft . For deeper diving you'll want to consider our most popular size - the standard Catalina Aluminum Cylinder 80 cu ft . It can easily support an average sport diver on a 130 foot scuba dive in moderate currents and weighs only 31 pounds. If weight is no concern and your air consumption is higher, choose the 100 cu ft. model.

For people with smaller frames, the Catalina Aluminum Scuba Tank both size 50 cu ft and 63 cu ft are the best bet. A Tank 40 cu ft. and less is known as Pony Tank(smaller tank). Technical divers have recognized the added safety of redundant air supplies (Dive Tank). Today, Recreational divers use Pony Tank for wall and wreck dives.

Aluminum and Steel Cylinders

All tanks inspected, tagged, minimally pressurized and ready for a fill*.
Item
Description
Capacity Cu Ft.
Service Pressure P.S.I.
Weight Empty w/ Value Lbs.
Buoyancy Full
Buoyancy Empty
Colors
Height w/ valve in inches
Price in USD
FX80DVB
Primary-Steel
80
3442
28.6
-8.05
-1.74
White
25.87
259.99
FX100DVB
Primary-Steel
100
3442
34.3
-8.41
-.59
White
30.39
349.99
FX117DVB
Primary-Steel
117
3442
38.9
-9.12
0.16
White
29.21
369.99
FX133DVB
Primary-Steel
133
3442
42.7
-9.08
1.45
White
31.78
429.99
C-100
Compact-Aluminum
100
3300
47.71
-7.8
-0.4
Yellow,  Blue. Black, Brushed
30.3
239.99
C-80
Compact-Aluminum
80
3300
35.91
-5.9
-0.2
Yellow, Blue, Brushed
28.1
189.99
S-80
Primary-Aluminum
80
3000
33.11
-1.8
4.0
Yellow,  Blue, Black, Red, Purple, Pink, Green, Brushed, Shot Blast
28.8
159.99
S-63
Primary-Aluminum
63
3000
28.71
-2.6
2.0
Yellow, Pink, Blue, Black, Red, Brushed
24.6
159.99
S-53
Primary-Aluminum
53
3000
27.11
-4.1
-0.2
Brushed, Yellow
22.2
149.99
S-40
Pony-Aluminum
40
3000
17.41
-2.6
1.7
Yellow
27.9

144.99

S-30
Pony-Aluminum
30
3000
15.21
-2.4
-0.2
Yellow
23
134.99
S-19
Pony-Aluminum
19
3000
9.31
-1.3
neutral
Yellow, Black
20.4
124.99
S-13
Pony-Aluminum
13
3000
7.21
-1.7
-0.8
Yellow
15.8
119.99
S-6
Pony-Aluminum
6
3000
4.11
-1.5
-1.1
Yellow
15.8
104.99
*Every tank we sell is visually inspected(VIP), stickered, and filled to 500PSI prior to shipment - a $15 Value! Tanks shipped by air and those shipping internationally must be emptied prior to shipment - these tanks will require re-inspection prior to use. In the case of emptied steel tanks, it is possible that mild interior flash rusting will occur during transit. Unfortunately, this is unavoidable and is the customer's responsibility.

*for order by mail call for shipping

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