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Old 12-11-2014, 03:03 PM   #1 (permalink)
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Default co2 is it safe?

hi !
i am thinking of use of presurized co2 in my fish tank, but i am afraid of if it is safe to use it.can u advise me of the right measures with use of co2?can it be fatal if an accident occurs with the co2 system?
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Old 12-12-2014, 12:28 AM   #2 (permalink)
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Default Re: co2 is it safe?

Yes it can be fatal if an accident occurs and it dumps all the co2 in your fish tank. However it is very avoidable. Using a very good regulator is the key to avoiding that. I learned that from experience. Never go cheap on CO2 regulator. Measuring is easy if you use those co2 color changing kits. You can also monitor your fish's response to check if its too high.
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Old 12-12-2014, 01:35 AM   #3 (permalink)
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Default Re: co2 is it safe?

I could be wrong but I think the op means fatal to the owner. The answer is no.
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Old 12-12-2014, 08:22 AM   #4 (permalink)
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Default Re: co2 is it safe?

Atmospheric CO2 is considered a trace gas since it's concentration is naturally so low. A slow leak in a canister would quickly dissipate. At best, if it somehow built up under the stand, as soon as you open the door it would thin out. As for toxic, also no. You exhale CO2 all day long. Its a natural compound that is relatively inert (that why it's used by welders).

For the fish, if the levels in the water get too high, the fish can have a difficult time "exhaling". There can be plenty of O2 in the water. When this happens, your snails, fish, and just about everyone else starts climbing to the top of the tank. The CO2 will be lower near the surface where it can outgas into the atmosphere.

As Tanan said, there are plenty of things you can do to protect yourself from hurting the fish. As for yourself, short of doing something nuts like holding it upside down and cracking off the valve stem, you'll be fine.
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Old 12-14-2014, 11:55 AM   #5 (permalink)
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Default Re: co2 is it safe?

CO2 is generally safe in a considerably wide range. You do not need to measure it specifically.
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