How long will a 5lb co2 tank last

Setting up my first co2 system for two of my aquariums (2 tanks one co2 canister). Just wanted to know how long your co2 tanks last, with the size of the tank and bps of course! Share Sort by: Top. Open comment sort options. Best. Top. New. Controversial. Old. Q&A. Add a Comment.

The tank & regulator cost me $50USD together from an airbrush artist who no longer wanted this "baby" tank & had a spare reg laying about. Refills, around here, run from $7 in the big city to $20 locally. Word of warning: In my experience, prolonged airbrushing (@ ~25psi) will cool the tank pretty well.And in my opinion CO2 is really not that dangerous, a 5lb tank isn't anywhere near enough to displace enough oxygen in any reasonably sized room to be dangerous for your breathing. The biggest danger is that if it blows out and vents rapidly the tank will get very, very cold and contact with any boiling CO2 liquid can cause instant frostbite.The chemistry of CO2 works out so that a 5 lb tank turned into gas at 1 atmosphere at 0 degrees C will yield 1150 liters, more of less of CO2. A 5 gallon Corny will take about 20 liters or so to fill, so if you are carbonating to 2.5 Volumes, you will use about 70 liters per keg, if you count dispensing volume. it would be enough gas to ...The area around the tank and cylinders should be well-ventilated if possible and should be monitored by a CO2 safety alarm. CO2 tanks and cylinders should be stored in areas with a temperature less than 125F (51.7C). CO2 tanks and cylinders should always be connected to a reducing valve or regulator with a pressure safety valve.How to Set Up a Draft Beer Regulator to a CO2 Tank. Watch on. Securely attach the regulator to the gas cylinder. Close the regulator's shut-off valve "C". Completely open the gas cylinder valve "A". Slowly turn the regulator adjustment "B" until the low pressure gauge "D" displays the desired pressure.It depends on a few factors. If you are using the CO2 only to dispense the beer, not to carbonate it, you may get as many as thirty 5 gallon Cornelius kegs out of one 5 lb. CO2 cylinder. However, most homebrewers are also using CO2 to force carbonate their brew, so this brings it down to around ten 5 gallon Cornelius kegs out of one 5 lb. CO2 ...So I never measure how frequently I am swapping out CO2 tanks. My 60l canisters last 2 to 2-1/2 weeks, and other than my morning coffee (about .6l), it is my main hydration. I make a liter a day with a Terra and it lasts a month. If I make it SUPER fizzy it lasts 3 weeks making a liter a day.

Sep 8, 2021 ... I worked for a CO2 gas filling company for 8 years. Although the idea of switching to a bigger tank is great, I would 100% recommend using a ...These empty 5 lb CO2 cylinders are perfect for homebrew and commercial keg purposes. The aluminum construction is both lightweight, and highly corrosion ...Co2 is sold by weight, not volume. If you stick the cylinder in the fridge, it might show 500 psi. If you take it out, it might show 800 psi. So, that gauge is meaningless. It'll show "order co2" until the tank is more than 90% empty, and then go immediately to "empty" as co2 is a liquid, but is dispensed as a gas.The complete paintball setup comes out around 100 dollars cheaper than the traditional 5lb aluminum setup, but I am wondering if it is worth it or if I will need to refill the co2 cannister too often. How long would a 20oz CO2 tank last for a 44 gallon tank? Thanks! 5 comments.How long should a 10# CO2 tank last?I was wondering how long a 5lb CO2 tank usually lasts. I kegged 5 gallons, forced carbed at 20psi for 3 days and served at 9psi since mid December. Just recently noticed my regulator is down below 5psi and tried to turn the pressure back up to 9 psi to no avail. The tank does feel light so wondering if it's empty.

1,231. Reaction score. 26. Location. Stevens Point. Oct 30, 2009. #1. So i just started kegging a couple of weeks ago. I originaly had a single regulator with both …Read the tank's label to determine weight (60L is around 438grams). Grab a wrench and unscrew the top (slowly to let any excess gas leak out). Use kitchen scale to measure empty tank (around 500 grams with the top valve removed). Fill with dry ice (I use a 3D printed funnel to help), use kitchen scale to weigh the tank as you add more dry ice ...You are correct in that the left gauge is the working pressure and the right gauge is the pressure inside your co2 tank. Should be around 800 to 700 psi when full. ... Bump: By the way, a 5lb cylinder on a 25g tank might last 4-6 months at average use. A 10lb cylinder will double that, or a 50g tank will halve it. ... How long it takes to go ...hooha. It's probably easier/more affordable getting a 5lb tank. If you're going to go high light, you will probably use more C02 eventually as well. A 5lb tank on my 55 lasts about 4-6 months. I got a 2.5lb tank for a 20 gallon and if I remember correctly it's cost was close to a 5lb tank (got it for space concerns).This means that each time you dispense a keg, you are using up a certain amount of CO2. The amount of CO2 required for dispensing beer depends on the pressure at which you carbonate and dispense, as well as the length of your beer lines. A 2.5 lb CO2 tank contains 2.5 pounds of CO2, which is equivalent to approximately 40 ounces or 1134 grams.

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Typically, a paintball tank can last up to 15 years, but this duration can vary based on the tank's quality, material, usage conditions, and maintenance. Regular maintenance, including a hydro test every three to five years, is crucial. This test identifies potential issues like cracks, leaks, and dents. If you neglect these tests for more ...3656 posts · Joined 2007. #2 · Apr 15, 2021. You should get a 5lbs/ 2.2kg co2 tank for an aquarium that size unless you're fine with refilling co2 every week. The 5 lbs tank should last you several months. I have a 20 lbs tank and it should last me a year, Algae happens. Share.Check out what else is great about this 5 lb. CO2 tank. ... This new 20 lb aluminum CO2 cylinder is the perfect choice for portability and long lasting dispensing to serve your favorite beverages at home. Sale! 10 lb CO2 Cylinder with Handle - Aluminum - New $ 139.90 $ 134.95.I've got a 20 gal tank and I'll be setting it up soon, but I'm curious on the "stats" of a 5 Lb CO2 tank. How long might one fill last on a 20 gal… Advertisement

Just set up my new 5lb co2 tank. How long can i expect it to bubble before it needs refilling? Just wanting a ballpark guess. 1000lb current pressure 30lb operating pressure 60 bubbles per minute 80 gallon tank 30lb operating pressure 60 bubbles per minute 80 gallon tank45-50 days. In a 10 hour cycle, you would use about 20-25gms of cO2 running it at about 2 bps. Try getting a short body co2 cylinder. These cylinders are "fat" but not "tall", so if height is the constraint then this would be a better option. Refilling cylinder every few days can get very frustrating. -Preeths.Image Courtesy of Wiki Commons. The most common way to determine whether your CO2 tank is empty is to check the pressure gauge. Most CO2 tanks will have a pressure gauge attached that displays the amount of pressure inside the tank. Typically, a full CO2 tank will have a pressure reading between 800 and 900 psi (pounds per square inch ...How long does a 5lb CO2 tank last? Thread starter kegtoe; Start date Oct 30, 2009; Help Support Homebrew Talk - Beer, Wine, Mead, & Cider Brewing Discussion Forum: ... Just for reference, I usually get 5 kegs per tank in which I use the CO2 for force carbing, serving, cleaning/sanitizing lines in between kegs. Reply. B. BuzzCraft Well-Known ... if you fill less than 5 gal of beer into the 5 gal corny keg, it will take more CO2 under the above bullet point and less CO2 under the next bullet point. finally, it takes a further ~ 1.67 units to serve 5 gal of beer at 10 psi. So we can purge, transfer, carbonate, and serve around 8-10 kegs with a full 5-lb tank. Reply. When you buy the carbonator it comes bundled with a cartridge, so the "device only" upfront cost of the carbonator is really only $63 to $183 (purchase price less CO2 cartridge). How long will a 5lb CO2 tank last for Sodastream? A 5lb tank of CO2 will last for 15-20 5-gallon kegs of beer.A 20 lb CO2 tank should last about 8-10 hours at 60 psi! I know T-shirt artists who spray all day at 60 psi with one 20 lb tank, so at maybe 20 psi for airbrushing models you should get several more hours than that by far.Total Price: $280.48 $360.49. Add to Cart. This item: 5 lb New Aluminum CO2 Tank Cylinder with CGA320 Valve. $108.80 $130.56. [6 PACK] 16g Mini Regulator CO2 Cartridge - Disposable by Leland TapGas. $11.99 $24.78. 10 PACK 8 gram Disposable CO2 Cartridges for uKeg Growler. $15.08.But Airgas has always been an "expensive" place. I consider this an OK situation since a 5lb bottle of CO2 lasts me a long time. Meanwhile, there was a time when I came to Airgas to do a swap, but they had no full CO2 bottles ready. They pointed me to a different CO2 place (Carbonic Service in Santa Clara), which seemed to be mostly brewer ...Other than being the oxygen tank duration calculator, there are many different names for this tool is famous as: Oxygen calculator;; Oxygen flow rate calculator; and; O 2 tank calculator.; Our tool provides information on how long an oxygen tank will last based on size and flow rate.Picturing an oxygen tank immediately brings to mind a hospital or healthcare facility, which signifies its value.

CO2 Cylinder. Refer to picture 1. This is the metal container that stores Carbon dioxide in compressed form. It comes in various sizes. For a 40gallon aquarium tank, a 5lb cylinder lasts for around 3-4 months at a good injection rate. Cost of CO2 refill for a 40 gallon tanks should cost less than $5 USD a month.

An average human exhales around 2.3 pounds of CO2 in a day. That rate increases by up to a factor of eight during heavy physical exertion and falls somewhat during periods of relax...Getting my first sixtel from Brew Republic, where I work (ed) part time (until Northam shut down all but carryout orders, so they're on a skeleton crew now). The Brewers have informed me they don't have the gear to fill CO2 from their supply. They recommend Roberts Oxygen, who supplies them. Those locations are a bit out of the way, but I see ...First, locate your tire size in the left column. Then determine how much air you are adding from trail pressure to street pressure and find your section along the top row. Each section (10, 15, 20 psi) shows your air up time and how many tires you can fill based on your Power Tank size. Note that these numbers are fairly linear so if you need ...Using a high-quality LED light can also help to minimize tank temperature. CO2 and Lack of Nutrients. Ascertain that the CO2 level in the water is within control. Increased CO2 levels would cause the fish to become unwell. When the CO2 level in the water rises, aquascaping likewise grows slowly.Since my search results excluded all words from "how long does a 5 lb co2 tank last" except for "long" and "tank"! How long does a 5lb co2 tank last for you guys? I can't decide whether or not to spend the extra $35 dollars for the 10LB tank. Thanks!Physics says you're wrong. CO2 liquefies at 870psi at room temp that pressure doesn't change. Even paintball tanks are filled with liquid CO2. All CO2 tanks hold liquid CO2, fill stations just have a siphon tube so it fills with liquid instead of the gas coming from the regulator.How long will 5lb CO2 tank last SodaStream? A 5lb tank of CO2 will last for 15-20 5-gallon kegs of beer. How heavy is a 10 lb CO2 tank full? A 10 lb. CO2 tank should be able to force-carbonate and serve between fifteen to twenty 5 Gallons kegs of homebrew. Aluminum with a tare weight of 14.4 lbs. Measures 6.9″ in diameter and 20.25″ tall.A good quality CO2 tank will last for at least 4 to 5 years because the quality and the manufacturing are up to the mark. In comparison, a low-quality tank that isn’t expensive might work well for a few months only. Investing in a high-quality tank is best if you play paintball regularly. I recommend investing in an excellent CO2 tank because ...I've been using a 5lb CO2 tank with my drinkmate for a few months now, I've probably gone through 10 or so tanks with no issues. I just switched over from my brewery (which closed) to an Airgas for the Co2 exchanges and noted on my first tank that my Drinkmate now just releases CO2 as soon as I open the tank and not when I press the Drinkmate button and the only way to stop it is to shut off ...

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The sodastream canister is 14.5 oz. So if you get a 5 lb, it would be about 5 lb x 16 oz / 14.5 oz which would be 5.5 times as much use. I have a 20 lb tank, haven’t refilled it after one year and I drink about 2L per day. Check out what else is great about this 5 lb. CO2 tank. ... This new 20 lb aluminum CO2 cylinder is the perfect choice for portability and long lasting dispensing to serve your favorite beverages at home. Sale! 10 lb CO2 Cylinder with Handle - Aluminum - New $ 139.90 $ 134.95.5#: This is the maximum mass in pounds of CO2 that can be filled into this cylinder. T7.40LB: Tare weight of cylinder and valve in pounds. TC-3ALM124: "TC-3ALM" is Transport Canada's specification for seamless aluminum alloy cylinders with a minimum service pressure greater of 1.0 Mpa. "124" is the service pressure rating of the ...Looked this up from the internet: A pound of liquid CO2 in a tank contains 8.741 cubic feet of gas, so a 20lb. cylinder would hold 175 cubic feet CO2, and a 5lb. cylinder would hold approximately 44 cubic feet CO2 5 gallons is actually only about 2/3 (.67) cubic feet. It's hard to believe but true.How long will CO2 last? 1360 Views 5 Replies 5 Participants Last post by airborne_r6, ... · May 14, 2009. Add to quote; Share Only show this user. I was wondering if there is a mathematical way to figure out how long a 5lb co2 tank would last given a static number of bpm. Is there a way to measure how much co2 a bubble represents in a tank ...On average, a standard 5-pound CO2 tank can last for about 5-8 half-barrel kegs. If you use your kegerator frequently, you may need to refill the CO2 tank every 2-3 months. ... How Long Does A 5Lb Co2 Tank Last In A Kegerator. What Co2 Pressure Should You Set For A Kegerator. 9 Unbelievable Kegerator Co2 Regulator For 2024.A 5-lb CO2 tank will last between 6-8 half barrel, or full kegs, before it will need to be filled. A 10-lb CO2 tank will dispense between 10-13 full kegs per fill. Q.Physics says you're wrong. CO2 liquefies at 870psi at room temp that pressure doesn't change. Even paintball tanks are filled with liquid CO2. All CO2 tanks hold liquid CO2, fill stations just have a siphon tube so it fills with liquid …For a 55 gal, a paintball tank won't last very long. Better off in the long run getting a 5lb or even a 2.5lb tank. Price difference on the cost and fill of those tanks arent much different so you might as well get a bigger tank.Model: CYL-2-5-AL-CO2-N. $49.30 $74.95. + FREE Shipping. The 2.5lb CO2 Air Tank is produced from high strength aluminum alloy. Enjoy the benefits of aluminum tanks with a 2.5lb CO2 Air Tank. Buy It Now See More Information. In stock. Secure online ordering. Features. ….

The lifespan of a 5-lb CO2 tank on a kegerator can vary greatly depending on the specific use and the settings of the beer draft system. Generally speaking, kegerators use between 2-6 pounds of CO2 per month. Therefore, a 5-pound CO2 tank will last an average of 2-6 months.5lb CO2 tank will make roughly 85 to 132.5 liters. I typically carbonate 5 gallon soda kegs, and depending on the amount of carbonation I'm forcing into each keg, I'm usually able to get between 5-7 kegs out of a 5lb CO2 tank. 1 gallon = 3.8 liters. 5 gallons = 18.9 liters. 25 gallons (5 kegs) = 94.6 liters. 35 gallons (7 kegs) = 132.5 liters.CO2 Cylinder For a 40gallon aquarium tank, a 5lb cylinder lasts for around 3-4 months at a good injection rate. Is co2 good for aquarium fish? CO2 plays a vital role in the life of fish Too much or too little will not only harm the fish but may lead to the untimely death. Fish produce carbon dioxide during respiration. Too much CO2 in the water ...Smaller tanks, such as 2.5 lb or 3 lb tanks, are often used for portable kegerators or for smaller keg sizes. Larger tanks, such as 50 lb or 100 lb tanks, are primarily used for commercial applications. When selecting the size of your CO2 tank, consider your usage frequency, keg size, space constraints, and portability needs.If you’re an avid homebrewer, a paintball enthusiast, or someone who uses CO2 for various purposes, you know how important it is to have a reliable source for refilling your CO2 ta...My 5lb co2 tank lasts about 4-5 months at about 4-5 bubbles per second so that will give you a rough idea. I figure a 20lb tank would last around 16 months at that bubble rate. Less if you have a higher bubble per second. Again just a rough estimate. You should get at least a year between refills I would think. Maybe less thats a big aquarium. I usually only get 5-6 (maybe 7) kegs out of it but I always have one on 45 psi fir carbonated water and I go though 2-3 kegs of that. I also force carbonate my beer for 2 days at 45 psi (then let rest unplugged for a day) then hook back up for 8-10psi. I also purge each tank 5-6 times before carbonateing. How Long Will a 2.5 lb CO2 Tank Last? If you’re a homebrewer with limited space, there’s a good chance that you have a 2.5-lb CO2 tank. As you might have guessed, a 2.5-pound tank will only last half as long as a five-pound one. Here’s a table showing how long a 2.5-pound CO2 tank will last with various keg sizes. How long will a 5lb co2 tank last, 5279 posts · Joined 2006. #3 · Jun 24, 2008. I have 2 20ozers and a 24oz. 16oz is a pound. Mine lasts about 6 weeks on a 29 with a glass diffuser. If you have a reactor the gas will last longer as you geet 100% of the gas dissolved. For that large a tank I wouldnt recommend such a small tank. Ehfipimp #273 ( Eheim Classic: 2260, 2217, Eheim ..., Stainless Steel 5 lb Co2 Carbon Dioxide Tank 10 lb Dry Fire Extinguisher Vehicle Mount Bracket 5" to 5.25" Diameter Cylinders $69.95 $ 69 . 95 FREE delivery Jan 25 - 29, Wow that looks like a scuba tank. For about $100 you could get an Aquatek CO2 mini regulator and get a 24 oz refillable CO2 tank. Get a good digital timer and use CO2 tubing (as opposed to airline tubing) Get a good diffuser. In a tank that size, the 24 oz kit will last a couple of months., A 20 lb CO2 tank should last about 8-10 hours at 60 psi! I know T-shirt artists who spray all day at 60 psi with one 20 lb tank, so at maybe 20 psi for airbrushing models you should get several more hours than that by far., Your cylinder should last long, like a year or longer. A really long time. I have a 10 lb tank. I used it for a keg of beer, probably depleting about 1/4 to 1/2 of it, and have been using it on my planted tank for a year and a half now. I still have decent pressure, and I'm assuming it will last a fair bit longer. , We may earn a commission for products purchased through links on this page, Subject: Re: 5lb. CO2: How long should it last? From: Charley Bay <Charleyb at Cytomation_com> Date: Tue, 9 Jan 2001 09:31:17 -0700 ... They are supposed > to > > fill the tank by weight, not pressure. If there is ANY liquid CO2 in the > > tank, the pressure will be constant - 850 PSI or so depending on temp. > Since > > the tank will be cold ..., I have bought this CO2 tank back in 2015 and its still running 24/7. How long it will last .... ? I don't know yet., CO2 is liquid, about 400x times as dense as a gas at 1 bar. Quick calc: 14lbs/2.2=6.36kg. 6360g / 1.977g/l = 3219 liters. 3219 liters / 10LPM = 322 minutes of welding. I have a 30lb tank I mix with argon at 25%. Have gone through 3 bottles of argon (1 80cf, 2 125cf). The CO2 tank still feels just as full. Some o fthe argon was used for TIG though., We may earn a commission for products purchased through links on this page, My CO2 tank was at 2000psi when I started and is at 800 now. If your gauge was correct I would say your about 2/3 used so another couple months and you will need to refill it. Left gauge tells you how much is left. When it drops to zero, empty. My left gauge was about 900 since I started it 18 months ago., about how long will it last? I have a 20 gallon with 3.5 wpg... its not heavly planted yet... but it will be :p ... 5LB CO2 tank. Thread starter TheNamelessPoet; Start date ... low pressure regulator, check valve (highly recommended, especially if your CO2 tank is lower than your fish tank), and needle valve setup was ~$160 shipped. The 5lb ..., How long does a 5lb CO2 tank last? Thread starter kegtoe; Start date Oct 30, 2009; Help Support Homebrew Talk - Beer, Wine, Mead, & Cider Brewing Discussion Forum: ... Just for reference, I usually get 5 kegs per tank in which I use the CO2 for force carbing, serving, cleaning/sanitizing lines in between kegs. Reply. B. BuzzCraft Well …, Jan 16, 2020 ... There will be a Stamped Date on the tank your tank ... How Long Can A Co2 Tank Last - Co2 Tank Sizes Chart [CryoFX] ... 5 lb CO2 Tank by Coldbreak., A quick answer is here. The gas flow rate which is measured in cubic feet per hour (CFH) gives us a rough idea about how much gas to have prior to a MIG welding job. Typically, you need 15 to 40 CFH of gas for metal thickness ranging from 1/8 - 3/4 inch. Also, note that CO2 lasts longer than other gases., Search titles only By: Search Advanced search…, Jan 7, 2020 ... DANDLINC•74K views · 16:50 · Go to channel · How Long Can A Co2 Tank Last - Co2 Tank Sizes Chart [CryoFX]. CryoFX•27K views · 5:07 &midd..., Snagged a great deal on a 20lb co2 tank back in April ($10!! yes really!!); it went online on May 1st. Still going strong, and I brew at least 3 batches a month, all kegged, and force carbed. Curious to see how long a 20lb lasts for others. My little 5lb tank would last about 3 months; doing..., How long will a CO2 tank last in a grow room? tank should theoretically last 44 days (175/4), while the 5lb. tank will last about 11 days (44/4). These estimates do not take into account plant uptake of CO2, opening doors or curtains, or other opportunities for CO2 to escape and require replenishment., The number of kegs you can dispense before needing to refill your CO2 tank depends on the size of the tank. If you’re using a 5lb. CO2 tank, you can dispense 2 to 4 full-sized kegs before needing to refill. The coolness of the ambient temperature also plays a role, with colder temperatures allowing for more kegs to be dispensed., Generally speaking, a tank of argon gas will last for around 10-12 hours of welding time. However, if you are using a higher flow rate or a different type of electrode, your tank may not last as long. Assuming you’re using a standard argon tank and welding at 20 amps, you can expect to get approximately 11 hours of welding time out of a ..., The average industrial supply tank of argon gas, at around 250 cubic feet, will last about 10 hours at a 20 – 25 cubic feet per hour flow rate. Most household tanks are between 60 and 80 cf, and at a 20 cfh flow rate will last around 3 to 4 hours. However, the lifespan of your argon tank during TIG welding may vary as it depends mainly on ..., The area around the tank and cylinders should be well-ventilated if possible and should be monitored by a CO2 safety alarm. CO2 tanks and cylinders should be stored in areas with a temperature less than 125F (51.7C). CO2 tanks and cylinders should always be connected to a reducing valve or regulator with a pressure safety valve., Your cylinder should last long, like a year or longer. A really long time. I have a 10 lb tank. I used it for a keg of beer, probably depleting about 1/4 to 1/2 of it, and have been using it on my planted tank for a year and a half now. I still have decent pressure, and I'm assuming it will last a fair bit longer. , One 90 cm tank could probably consume a 2-liter tank of CO2 in 3-4 months, depending on the usage. High-light setups as already known does require more CO2 since plant photosynthesis is way faster compared to low or medium lit tanks and of course larger tanks would naturally need more CO2. Medium sized, low to medium lit tanks would only ..., A single 5 lb propane tank holds enough fuel for a multiple-day camping trip, so you don’t have to deal with multiple tanks. 5 lb propane tanks can be refilled countless times, while most of the 1 lb camping propane tanks are single-use and disposable. Five pound propane tanks are much cheaper to fill, can save money in the long run, and are ..., How long does a bottle of c02 last? I have a 5lb bottle, set at 12 psi thru a clippard needle valve thats always open. The shop that fills the tank only fills it to 800psi. ... Use windex or dish soap and water in a spritzer bottle to check your CO2 tank, regulator, solenoid, bubble counter ect ect for leaks after you put it together. Mark., The date of manufacture, commonly known as the "Born On" date, is expressed numerically in a mm/yy format. The tank must be hydrotested every five years after this date. The next number indicates the tank's total capacity of liquid CO2. The last figure on the third row beginnig with "TW" is the tare weight of the tank expressed in pounds., How long will a 5 lb., 10 lb., and 20 lb. CO2 tank last? What does the carbonator do? Search for: Recent Posts. New Website Just Launched! SodaParts on DIY Network; A Brief History of Soda; Environmental Benefits of Soda Fountains; Archives. December 2015; April 2012; October 2011; June 2011;, Mar 8, 2008. #10. I use an automatic co2 doser in one tank, and a regular solenoid that turns off at night in my others. The automatic lasts about 8 months, the regular solenoid about half that. Oh, and its a 5 gallon bottle. Expand signature. 720g - used to have 10 plecos., A 20lb propane tank contains 430,000 BTU. To determine how long it will last on a firepit, you divide the figure by your fire pit's BTU rating. For instance, the Endless summer firepit would last for; 430,000/50,000-=8.6 hours with the 20ln propane tank. You can get more usage time from your 20lb tank by reducing or keeping the flame low this ..., Heres a chart to help answer the question on How long do Co2 Tanks last. CO2 tank weight in pounds Composition Usage limit 50 Aluminum 1.25 minutes 50 (short) Steel 1.25 minutes 50 (Short) Steel 1.25 minutes 50 Aluminum 1.25 minutes. ... CO2 Refill Prices Size of Cylinder Exchange $ Buy $ 5lb. CO2 Cylinder $19.99 $69.99 10lb. CO2 …, In general, a half pound per quarter keg, 1 pound per full keg. You should get 15-20 sixth kegs out of 5 pounds. A back up bottle is the best thing to do because what your tank gauge is telling you is the pressure of the gas above the liquid CO2. Once the liquid is gone, the pressure will quickly drop and you will be out.