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Old 01-20-2007, 08:49 PM   #1 (permalink)
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Default Does Co2 grade matter?

Hi,

is there a big difference between beverage grade co2 and the co2 weilders use? Would the co2 from a weilding supply store be safe in an aquarium?


Thanks
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Old 01-20-2007, 08:51 PM   #2 (permalink)
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There might be contaminants in the CO2. However, I get my tank filled at an industrial welding company and so does everything I know...so I would think it's safe enough.
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Old 01-20-2007, 08:51 PM   #3 (permalink)
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Yes. They are the same thing. There is lab grade/medical grade CO2 that is very pure but it is unnecessary for planted tanks. CO2 from a welding/fire extinguisher place is perfectly safe for aquarium use.

Same goes for CO2 from a paintball place.
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Old 01-21-2007, 09:00 AM   #4 (permalink)
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If it makes you feel better (but, then again maybe not so much) most if not all C02 tanks used to carbonate soda fountains are filled in in the same shops that welders use to fill theirs.
So I would assume that if its safe for us to drink, fish shouldn't have any problem other than us overdosing on the C02.
HTH.
Rafo
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Old 01-21-2007, 12:58 PM   #5 (permalink)
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Quote:
Originally Posted by VITARTE View Post
If it makes you feel better (but, then again maybe not so much) most if not all C02 tanks used to carbonate soda fountains are filled in in the same shops that welders use to fill theirs.
So I would assume that if its safe for us to drink, fish shouldn't have any problem other than us overdosing on the C02.
HTH.
Rafo
Not quite that way in Canada. If the CO2 is going to be used to power/drive beverage dispensers it must be medical (suitable for human consumption)
grade in Canada. Therefore, I get my tank filled at the local Coca Cola distributor. No worries about quality, done in 10 minutes in my own tank (no exchange) and 35% lower price than a welding supply store. The welding supply srores are exchange (old beater for my newer tankl) or wait at least a week for the tank to go to their plant and return.
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Old 01-21-2007, 04:18 PM   #6 (permalink)
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Beverage grade CO2 is what you are getting. Not medical grade. I can assure you of that. Beverage grade is made for human consumption. Medical grade is MUCH more expensive than that, by a factor of about 10X. Medical grade gases are treated as drugs and are subject to the same laws. Beverage grade gases are not.

Here's an example of stupidity in action for you..http://www.fda.gov/CDER/GUIDANCE/4341fnl.htm
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Old 01-21-2007, 04:38 PM   #7 (permalink)
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I get food grade C02, filled at a supplier to resturants. From what I understand food grade is a purer form of welders grade C02. I would think that you could not use welders grade for use in human consumed beverage.
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Old 01-22-2007, 07:59 AM   #8 (permalink)
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Trena, it would seem that way but tell that to many bars or college kids The local home brew places all get their CO2 tanks filled from the same place the welders do.

My plants, fish and shrimp and liver are fine.
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Old 01-22-2007, 09:14 AM   #9 (permalink)
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Quote:
Originally Posted by Rex Grigg View Post
Beverage grade CO2 is what you are getting. Not medical grade. I can assure you of that. Beverage grade is made for human consumption. Medical grade is MUCH more expensive than that, by a factor of about 10X. Medical grade gases are treated as drugs and are subject to the same laws. Beverage grade gases are not.

Here's an example of stupidity in action for you..http://www.fda.gov/CDER/GUIDANCE/4341fnl.htm
Rex:
Based on my understanding of the system, in CANADA the requirement is medical grade as distinct for what appears to be the US rules!
Vic
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Old 01-23-2007, 05:29 PM   #10 (permalink)
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And I'm telling you that there is NO way you are getting medical grade for less than welding grade. Medical grade gases are EXPENSIVE. They might call it medical grade but it's beverage grade. Which is suitable for human consumption. Also medical grade gases MUST be placed into a glass lined cylinder to maintain the medical grade. And I can bet you that every soda machine in Canada doesn't have a glass lined cylinder.

Please quote the section of the law in Canada that you claim requires the use of medical grade CO2 in food products. I spent about 30 minutes looking for it and found nothing. I think someone was yanking your chain.
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